RCM Roger Clark Motorsport

At the heart of all Roger Clark Motorsport engine’s is the now world renowned RCMS Modified oil pump.

This clever, effective modification has been designed to assist the Impreza with it’s oil

At the heart of all Roger Clark Motorsport engine’s is the now world renowned RCMS Modified oil pump.

This clever, effective modification has been designed to assist the Impreza with it’s oil supply and is now regarded as a must have modification with any Impreza engine build. Each pump is carefully checked, given a serial number and then modified to incorporate a different pressure relief valve ensuring greater reliability and peace of mind to your Impreza engine.

This variant of oil pump is fitted with the larger 12mm Rotor meaning a higher oil pressure is produced, perfect for modified engines where components require superior lubrication.

Also included with our modified oil pump is the front crank oil seal, rear gallery oil seal and X7 bolts for securing the pump to the engine block

• Modified with a billet, super finish, nitrided replacement plunger
• 12mm Internal drive rotor
• Serial numbered
• Primed with oil prior to dispatch

The latest evolution of our proven and hugely successful 14/14mm RCM Head Stud Kit designed for the ultimate in engine performance and reliability! Introducing the new RCM 14mm Superstud Head Stud Kit. 

Our engineers have taken the ultimate EJ series head stud solution to the next level by incorporating some new features into the RCM 14mm Superstud kit to improve performance and ease of installation for your EJ engine. 

• Larger 9/16" size stud (still compatible with RCM Head Gaskets)
• Supplied with x12 ARP 9/16" 8740 Chromoly 12pt nut
• Supplied with x12 ARP 9/16" 8740 Chromoly washer
• Incorporating 6mm hex in stud end for super easy install

It is essential engines modified to 500+bhp have the most reliable system for clamping the cylinder heads onto the block assembly to avoid the heads lifting under load at high levels of boost pressure. The RCM 14mm Superstud Head Stud kit provides this peace of mind!

Now used in many of the fastest and most powerful Imprezas across the globe the RCM 14mm Superstud Head Stud Kit is quite simply the foundation on which all our high bhp engine conversions (including Gobstopper and Gobstopper 2) race engines are built around. Replacing the conventional 11mm Subaru cylinder head bolts with a series of 14mm precisely manufactured super high tensile, aircraft grade S99 steel stud and nut system offers many advantages when building your engine. With a tensile strength much higher than that of the OE bolts and the increased stability provided by the RCM studs larger diameter when further combined with the more uniform clamping force provided by the stud and nut arrangement it is clear why so many championship winning engines run these kits!

All kits are supplied with RCM's own assembly lube, which utilizes Graphite DJ technology, ensuring you are able to install to the correct torque figures accurately.

• Cylinder head studs manufactured using "Aircraft Grade S99 High Tensile Steel" to WRC specification.
• Precision rolled threads.
• Cylinder head stud thread pitch (Block End): M14X2.
• Cylinder head stud thread pitch (Cylinder Head end): 9/16 - 18 UNF.
• Cylinder head stud length: 197mm.

Kit Contents:

• x12 RCM 14mm head studs.
• x12 ARP 9/16" 8740 Chromoly 12pt nut
• x12 ARP 9/16" 8740 Chromoly washer
• 1x Sachet of assembly lube and fitting guide for a comprehensive install.
•  

 To allow fitting of the RCM 14/14mm Head stud kit your engine block must be re engineered to accept the larger studs used in this kit. 

Due to the increased diameter of the cylinder head stud machining is required to the cylinder heads. The original head bolt passages must be drilled out to a larger diameter in order for the 14mm stud to pass through.

 Non RCM manufactured head gaskets used alongside this kit will require slight modification using our tapered reamer tool (See part number RCM910).

4x RCM2726 modified head location dowels are required when using this kit (Sold separately).

Our handy kit allows removal of the Air Conditioning pump by replacing the existing aluminium bracket (designed to hold both the alternator and air con pump).

After performance and reliability the next important factors when tuning your engine have to be "saving weight" and "appearance". Our Air Con Removal Bracket not only weights less than the original but it's also much smaller and neater keeping a factory appearance to your engine bay. We also include a selection of new fixings to mount the bracket to your engine block and to also support the alternator.

With the Air Conditioning System removed a substantial amount of weight can be removed, aiding performance and improving the look of your engine bay.

• X1 Steel Industrial Powder Coated Alternator Mounting Bracket
• X3 Genuine Mounting Bracket To Engine Bolts
• X1 Alternator Support Bolt
•  X1 Safety Lock Washer
• X1 Support Bolt End Clamp
• X1 Alternator Bracket Bolt

The RCM Billet Timing belt guide has been precision crafted using advanced CNC machining methods for the perfect fitment.

Designed to reduce the chance of the timing belt skipping a tooth at high rpm this simple part made from billet aluminium directly replaces the standard sheet metal part. Military spec hard anodised finish and laser etched with the RCM logo for a final seal of quality, the RCM Billet timing belt guide is supplied with an easy to follow installation guide and all required fittings for a comprehensive and hassle free install

•  X12 Performance studs.
• X12 Heat treated nuts.
  
• X12 Heat treated washers.
  
• X1 Sachet of Moly Grease.
  
• X1 Fitting Instruction Guide.
  

The RCM1540 Extreme 11mm Head Stud kit is an absolute must for your performance build.  Manufactured from Aircraft Grade S99 Steel, and with a tensile strength in excess of 237,000 Psi (1640MPa), our 11mm kit reduces head movement under boost, and provides optimum head to block clamping, ably dealing with the higher combustion pressures associated with a modified performance engine, up to around 450Bhp.  All kits are supplied with RCM's own assembly lube, which utilizes Graphite DJ technology, ensuring you are able to install to the correct torque figures accurately.

Cylinder head studs manufactured using Aircraft Grade Steel.
Cylinder head stud thread pitch (Block End): M11X1.25.
Cylinder head stud thread pitch (Cylinder Head end): M11X1.25.
Cylinder head stud length: 197mm.

Kit Contents:

• X12 Extreme studs.
• X12 Heat treated nuts.
• X12 Heat treated washers.
• X1 Sachet of moly grease.
• X1 Fitting instruction guide.

RCM's own modified head dowel, for use with our Uprated 14mm heads stud kits RCM2902 & RCM593.

Our dowels are each precision cut and opened, which allows them to fit over the shank of the larger 14mm stud, they can then be simply squeezed sut and tapped into place.  

A small video demonstrating how to locate them can be seen here.

The latest evolution of our proven and hugely successful 14/12mm RCM Head Stud Kit designed for the ultimate in engine performance and reliability! Introducing the new RCM 14mm Superstud Head Stud Kit.

Our engineers have taken the ultimate EJ series head stud solution to the next level by incorporating some new features into the RCM 14mm Superstud kit to improve performance and ease of installation for your EJ engine.

• Larger size stud (still compatible with RCM Head Gaskets)
• Supplied with x12 ARP M12 x1.25 8740 Chromoly 12pt nut
• Supplied with x12 ARP 12mm 8740 Chromoly washer
• Incorporating hex in stud end for super easy install

It is essential engines modified to 500+bhp have the most reliable system for clamping the cylinder heads onto the block assembly to avoid the heads lifting under load at high levels of boost pressure. The RCM 14mm /12mm Superstud Head Stud kit provides this peace of mind!

Now used in many of the fastest and most powerful Imprezas across the globe the RCM 14mm /12mm Superstud Head Stud Kit is quite simply the foundation on which all our high bhp engine conversions (including Gobstopper and Gobstopper 2) race engines are built around. Replacing the conventional 11mm Subaru cylinder head bolts with a series of 14mm precisely manufactured super high tensile, aircraft grade S99 steel stud and nut system offers many advantages when building your engine. With a tensile strength much higher than that of the OE bolts and the increased stability provided by the RCM studs larger diameter when further combined with the more uniform clamping force provided by the stud and nut arrangement it is clear why so many championship winning engines run these kits!

All kits are supplied with RCM's own assembly lube, which utilizes Graphite DJ technology, ensuring you are able to install to the correct torque figures accurately.

Kit Contents:

• x12 RCM 14mm head studs.
• x12 ARP M12 x 1.25 8740 Chromoly 12pt nut
• x12 ARP 12mm 8740 Chromoly washer
• 1x Sachet of assembly lube and fitting guide for a comprehensive install.

To allow fitting of the RCM 14/12mm Head stud kit your engine block must be re engineered to accept the larger studs used in this kit. 

Features:

• Huge increase in tensile strength and yield when compared with the OE head bolts.
• Massively increased clamping load for big bhp applications.
• Eliminates cylinder head lift at high levels of boost.
• Supplied with ARP high tensile nuts, washers, RCM assembly lube and installation guide.
• As used in RCM Gobstopper I + II Time Attack race cars.

Non RCM manufactured head gaskets used alongside this kit will require slight modification using our tapered reamer tool (See part number RCM910).

Engineered to perform under the most extreme of conditions our cylinder head gaskets are rated for use up to and over 600BHP.

Unlike most conventional cylinder head gaskets, our gaskets use what is most commonly known as a “folded stopper level”. This revolutionary design dramatically reduces the chances of any pressure leakage from the cylinders. An increased thickness in the gasket is introduced around vital sealing areas and the design of this extra layer forms a much stronger barrier to prevent gasses / pressure / water and oil escaping from its designated area. The layer acts as a very reliable defence and is highly recommended for any Subaru, specifically those running above the standard factory torque / horsepower figures.

In conjunction with this new technology our gaskets also feature a unique nitrile rubber coating. This coating is designed to act as a cushion in which to fill / take up any areas of imperfection found in either the cylinder head or block faces, to ensure you have the very best combustion chamber armour!

Finally our cylinder head gaskets are all stamped from dies as appose to laser cut. With die stamping you can process a large amount of material at once which means that variations in the quality of each individual gasket is far less compared to laser cutting (in which each gasket section is cut separately to one another). With Die Cutting the finished edges are also far superior, leaving a much smoother, neater edge to the gasket as appose to laser cut steel which leaves a sharper edge behind.

For the ultimate seal all our gaskets are manufactured and designed to accept the larger 12mm and 14mm cylinder head studs also available from our online store. The standard cylinder head bolt (the component that joins the cylinder head to the block and offers force to seal your cylinder head gasket in place) is 11mm thick and uses a relatively fine thread. It is important to remember this bolt was developed for use on a mainstream engine producing no more than 320Bhp, Subaru did not manufacture this bolt for use with anything above this power and as such it is important to consider stronger and more suitable replacements. Here at RCM we manufacture both a 12mm and 14mm replacement head stud and nut kits. The studs are naturally stronger due to their extra thickness and superior material quality but they also benefit from a much coarser rolled thread (meaning you can tighten them far more than the standard bolt which in turn will offer a much higher clamping load between both the cylinder head and block faces where you head gasket is situated.)

Reliability is key to any engine rebuild, whether done for higher horsepower applications or just a simple repair / refresh its important to choose your components wisely so that you don’t end up repeating the process later down the line

• 14mm Diameter Head Stud / Bolt Holes (Also suitable for use with Standard Head Bolts and 11mm Stud Kits)
• Die Cut
• Folded Stopper Layers
•  Multi Layer Steel Gasket (MLS)
• Nitrile Rubber Coated
• Improved sealing capacity over conventional gaskets thanks to its Nitrile Rubber Coating.
• Increased protection around combustion chambers by means of its Folded Stopper Layers.
• Die Cut precision manufactured for the highest quality finish and fitment.
• Ready for immediate use our larger 12mm & 14mm head stud kits

Please note these are individual head gaskets, you will need to add 2 x gaskets to your basket if you require a pair.

Engineered to perform under the most extreme of conditions our cylinder head gaskets are rated for use up to and over 600BHP.

Unlike most conventional cylinder head gaskets, our gaskets use what is most commonly known as a “folded stopper level”. This revolutionary design dramatically reduces the chances of any pressure leakage from the cylinders. An increased thickness in the gasket is introduced around vital sealing areas and the design of this extra layer forms a much stronger barrier to prevent gasses / pressure / water and oil escaping from its designated area. The layer acts as a very reliable defence and is highly recommended for any Subaru, specifically those running above the standard factory torque / horsepower figures.

In conjunction with this new technology our gaskets also feature a unique nitrile rubber coating. This coating is designed to act as a cushion in which to fill / take up any areas of imperfection found in either the cylinder head or block faces, to ensure you have the very best combustion chamber armour!

Finally our cylinder head gaskets are all stamped from dies as appose to laser cut. With die stamping you can process a large amount of material at once which means that variations in the quality of each individual gasket is far less compared to laser cutting (in which each gasket section is cut separately to one another). With Die Cutting the finished edges are also far superior, leaving a much smoother, neater edge to the gasket as appose to laser cut steel which leaves a sharper edge behind.

For the ultimate seal all our gaskets are manufactured and designed to accept the larger 12mm and 14mm cylinder head studs also available from our online store. The standard cylinder head bolt (the component that joins the cylinder head to the block and offers force to seal your cylinder head gasket in place) is 11mm thick and uses a relatively fine thread. It is important to remember this bolt was developed for use on a mainstream engine producing no more than 320Bhp, Subaru did not manufacture this bolt for use with anything above this power and as such it is important to consider stronger and more suitable replacements. Here at RCM we manufacture both a 12mm and 14mm replacement head stud and nut kits. The studs are naturally stronger due to their extra thickness and superior material quality but they also benefit from a much coarser rolled thread (meaning you can tighten them far more than the standard bolt which in turn will offer a much higher clamping load between both the cylinder head and block faces where you head gasket is situated.)

Reliability is key to any engine rebuild, whether done for higher horsepower applications or just a simple repair / refresh its important to choose your components wisely so that you don’t end up repeating the process later down the line

• 14mm Diameter Head Stud / Bolt Holes (Also suitable for use with Standard Head Bolts and 11mm Stud Kits)
• Die Cut
• Folded Stopper Layers
•  Multi Layer Steel Gasket (MLS)
• Nitrile Rubber Coated
• Improved sealing capacity over conventional gaskets thanks to its Nitrile Rubber Coating.
• Increased protection around combustion chambers by means of its Folded Stopper Layers.
• Die Cut precision manufactured for the highest quality finish and fitment.
• Ready for immediate use our larger 12mm & 14mm head stud kits

Please note these are individual head gaskets, you will need to add 2 x gaskets to your basket if you require a pair.

Engineered to perform under the most extreme of conditions our cylinder head gaskets are rated for use up to and over 600BHP.

Unlike most conventional cylinder head gaskets, our gaskets use what is most commonly known as a “folded stopper level”. This revolutionary design dramatically reduces the chances of any pressure leakage from the cylinders. An increased thickness in the gasket is introduced around vital sealing areas and the design of this extra layer forms a much stronger barrier to prevent gasses / pressure / water and oil escaping from its designated area. The layer acts as a very reliable defence and is highly recommended for any Subaru, specifically those running above the standard factory torque / horsepower figures.

In conjunction with this new technology our gaskets also feature a unique nitrile rubber coating. This coating is designed to act as a cushion in which to fill / take up any areas of imperfection found in either the cylinder head or block faces, to ensure you have the very best combustion chamber armour!

Finally our cylinder head gaskets are all stamped from dies as appose to laser cut. With die stamping you can process a large amount of material at once which means that variations in the quality of each individual gasket is far less compared to laser cutting (in which each gasket section is cut separately to one another). With Die Cutting the finished edges are also far superior, leaving a much smoother, neater edge to the gasket as appose to laser cut steel which leaves a sharper edge behind.

For the ultimate seal all our gaskets are manufactured and designed to accept the larger 12mm and 14mm cylinder head studs also available from our online store. The standard cylinder head bolt (the component that joins the cylinder head to the block and offers force to seal your cylinder head gasket in place) is 11mm thick and uses a relatively fine thread. It is important to remember this bolt was developed for use on a mainstream engine producing no more than 320Bhp, Subaru did not manufacture this bolt for use with anything above this power and as such it is important to consider stronger and more suitable replacements. Here at RCM we manufacture both a 12mm and 14mm replacement head stud and nut kits. The studs are naturally stronger due to their extra thickness and superior material quality but they also benefit from a much coarser rolled thread (meaning you can tighten them far more than the standard bolt which in turn will offer a much higher clamping load between both the cylinder head and block faces where you head gasket is situated.)

Reliability is key to any engine rebuild, whether done for higher horsepower applications or just a simple repair / refresh its important to choose your components wisely so that you don’t end up repeating the process later down the line

• 14mm Diameter Head Stud / Bolt Holes (Also suitable for use with Standard Head Bolts and 11mm Stud Kits)
• Die Cut
• Folded Stopper Layers
•  Multi Layer Steel Gasket (MLS)
• Nitrile Rubber Coated
• Improved sealing capacity over conventional gaskets thanks to its Nitrile Rubber Coating.
• Increased protection around combustion chambers by means of its Folded Stopper Layers.
• Die Cut precision manufactured for the highest quality finish and fitment.
• Ready for immediate use our larger 12mm & 14mm head stud kits

Please note these are individual head gaskets, you will need to add 2 x gaskets to your basket if you require a pair.

At the heart of all Roger Clark Motorsport engine’s is the now world renowned RCMS Modified oil pump.

This clever, effective modification has been designed to assist the Impreza with it’s oil supply and is now regarded as a must have modification with any Impreza engine build. Each pump is carefully checked, given a serial number and then modified to incorporate a different pressure relief valve ensuring greater reliability and peace of mind to your Impreza engine.

Please note that flow rate remains unchanged.

Our oil pumps are supplied with a replacement front crank oil seal and oil gallery, black sealing o-ring. It is also recommended that you use 3 bond sealer (SGA35) to seal the oil pump to the block assembly.

• Modified with a billet, super finish, nitrided replacement plunger
• 10mm Internal drive rotor
• Serial numbered
• Primed with oil prior to dispatch

Air Pump deletes are the perfect solution to removing the troublesome factory air pump system. CNC machined from Billet Aluminium and annodised in Black, these delete plates will cover the open ports on the cylinder heads with style. Included are two delete plates and stainless steel fasteners.

Vehicle Fitment:

• 2006-2014 Impreza WRX EJ25
• 2006-2020 Impreza WRX STI EJ25
• 2007-2009 Liberty GT EJ25
• 2008-2012 SH Forester XT EJ25

Note:

 Tuning is required after installation to resolve codes caused by removing air pump system.