Products

• Designed for a rev range of 3500-8000 RPMs
• 500-1000 WHP camshaft set 
• Idle slightly rougher than stock

GSC Power Division Valve Spring Mitsubishi  GSC4041 CNC turned Chromoly valve spring seats are meant for the 4G63 platforms pushing to the absolute limits, with an additional 0.035” built in, the need for shims and potential wrong stacking of shims is eliminated when higher spring seat pressure is required. Sold as a set of 16.

GSC Power-Division High Reving Lightweight 991 GT3 Conical valve spring kit.

• Max RPM: 11,000 RPM

GSC Power-Division Conical Valve Spring Kit with Ti Retainer for the Nissan VR30DDT includes 24 titanium retainers, 24 conical valve springs, and 24 valve spring seats. 

True conical valve springs are not a new concept and are industry proven to provide several key advantages over traditional spring designs. A major advantage of conical springs vs. traditional cylindrical or beehive springs is the damping and removal of valvetrain harmonics. Of the three designs, conical springs are the front runners in valvetrain harmonic stability. Utilizing a varying coil diameter as well as coil spacing, a conical spring acts as a natural harmonic damper in the transfer of valvetrain shock. This translates to less stress, less wear, and a longer life of the included components. This level of protection is needed in today’s engines being pushed to their physical and mechanical limits by aftermarket modifications. Every GSC conical spring offers a super finished surface treatment to go along with the patented, multi-step heat treatment process. The finished product is an extremely reliable, high-performance valve spring allowing the users to push higher RPMs, use more aggressive cam profiles, and turn up higher boost pressures.

• Max RPM:  9,500 RPM
• Max boost: 40 psi

GSC Power-Division Conical Valve Spring Kit with Ti Retainer for the Toyota G16E-GTS for the GR Yaris and Corolla includes 12 titanium retainers (6 Intake and 6 Exhaust) and 12 Conical valve springs and 12 new Spring Seats. 

True conical valve springs aren’t a new concept—they’ve been proven in the industry to offer several key advantages over traditional spring designs. One of the biggest benefits of conical springs compared to traditional cylindrical or beehive springs is their ability to dampen and eliminate valvetrain harmonics. Out of the three designs, conical springs lead the way in maintaining valvetrain harmonic stability.

Thanks to their varying coil diameter and spacing, conical springs act as natural harmonic dampers, absorbing the shock in the valvetrain. This means less stress, less wear, and a longer life for your engine components. This level of protection is essential for today’s engines, which are being pushed to their physical and mechanical limits.

Every GSC conical spring undergoes a super-finished surface treatment in addition to a patented, multi-step heat treatment process. The result? A super reliable, high-performance spring that lets you push higher RPMs and use more aggressive cam profiles with confidence.

If you’re looking to get the most out of your engine, GSC conical springs are the way to go. They’re built to perform, engineered to last, and designed to let you take your engine to the next level.

• Max RPM: 10,000 RPM
• Max boost: 60 psi

GSC Power-Division CONICAL Valve Spring with Ti Retainer for TB48 (W/SEATS)
Kit includes 24 Ti retainers, 24 conical valve springs, and 24 chromoly spring seats.

• Max RPM: 10,000 RPM
• Max boost: 40 psi (when boosted)

GSC Power-Division CONICAL Valve Spring with Ti Retainer for the Subaru EZ36

• Max RPM: 9,000 RPM

GSC Power-Division CONICAL Valve Spring with Ti Retainer for Toyota 3SGTE for shimless/shim-over bucket includes 16 titanium retainers and 16 conical valve springs. High RPM and High Boost levels are not a problem on these kits. True conical valve springs are not a new concept and are industry proven to provide several key advantages over traditional spring designs. A major advantage of conical springs vs. traditional cylindrical or beehive springs is the damping and removal of valvetrain harmonics. Of the three designs, conical springs are the front runners in valvetrain harmonic stability. Utilizing a varying coil diameter as well as coil spacing, a conical spring acts as a natural harmonic damper in the transfer of valvetrain shock. This translates to less stress, less wear, and a longer life of the included components. This level of protection is needed in today’s engines being pushed to their physical and mechanical limits by aftermarket modifications. Every GSC conical spring offers a super finished surface treatment to go along with the patented, multi-step heat treatment process. The finished product is an extremely reliable, high-performance spring allowing the users to push higher RPMs, use more aggressive cam profiles, and turn up higher boost pressures.

• Max RPM: 10,000 RPM
• Max boost: 50 psi
• Use only Toyota OEM keeper part number: 90913-03021 for the 3SGTE. Do not swap with 2JZ keepers as height will change more than .020"/.5mm causing lower install pressure. 

GSC Power-Division Dual Conical Valve Spring Kit with Ti Retainer & Chromoly Seats for the Subaru Turbo EJ platforms includes 16 titanium retainers, 16 dual conical valve spring sets, and 16 chromoly valve spring seats. GSC Power Division Dual Conical Spring Subaru Turbo EJ | GSC POWER GSC5074 Dual Conical Valve Spring Kit with Ti Retainer for the Subaru

• Max RPM: 10,000 RPM
• Max boost: 40 psi 

GSC Power-Division Dual Spring Set with Ti Retainer for Honda B-Series Vtec Platform includes 16 titanium retainers and 16 dual spring sets. This dual cylindrical set is made from the same high quality wire as our Beehive Kits and utilizes a nano-peened finishing process to allow for the lowest possible fatigue loss rate of any other dual spring set available for the B-series. Our springs will work with the factory seat so no need to remove the seal and replace the seat when upgrading your valvetrain. The retainer can be used with OEM valve keepers/lock or any of the aftermarket OEM replacement keepers/locks available.

• Max RPM: 8,500 RPM
• Max boost: 50 psi

GSC Power-Division Dual Valve Spring Kit with Titani9um Retainers for the Subaru 2015 WRX, BRZ and Scion FRS includes 16 titanium retainers, 16 dual valve spring sets, and 16 spring seats. This dual cylindrical set is made from the same high quality wire as our Beehive Kits and utilizes a Nano-peened finishing process to allow for the lowest possible fatigue loss rate. 

• Max RPM: 9,500 RPM
• Max boost: 50 psi

GSC Power-Division Dual Valve Spring Kit with Ti Retainer for Toyota 2JZ Platforms includes 24 titanium retainers, 24 dual valve spring sets, 24 inner valve spring seats, and 24 outer valve spring seats. 

• Max RPM: 10,500 RPM
• Max boost: 80 psi

GSC Power-Division Exhaust Valve +1mm for EVO X 4B11T

When creating our new valve line we set out to create the best performance, longest lasting valves available to the aftermarket. Using advanced 3D design and simulation software, we have created a stronger and higher flowing valve head design. We flow test prototype valve heads in the specific applications to make sure we have the highest flowing valve head available on the market today. With the materials used, we have less valve distortion at the face than any of the tested designs. Less distortion allows for better sealing under extreme conditions and more consistent performance throughout the life of the valve. GSC Power-Division's new valves are sure to become the industry standard for sport compact performance valves.

Valve Features

• Swirl polished heads for smoother air flow over the valve

• Back cut to reduce valve weight for higher RPM, higher boost pressure, and allow for more aggressive cam profiles without increasing valve spring seat pressures

• Valve stems are micro polished to allow for less oil retention on the stem, which creates less drag on the stem to guide for a smoother motion

• Intake valves are a modified 21-4n stainless and exhausts are a modified 23-8n stainless material for high heat capacity while maintaining longevity

• Valve tips are either hardened or have a stelite wafer tip fused so that the tip is within 5 Rockwell C of the rocker or valve tappet for extended life and less wear

• Valve tip lengths - we have taken extra time to adjust tip heights on the applications to require less tipping of the valve, to maintain proper tip height for proper valve train geometry, and to cut down on install times when setting valve lash

• We have also adjusted the keeper groove to properly balance intake and exhaust spring pressures to reduce the use of valve spring shims and maximize performance from our spring and retainer kits

• Valves will work with an OEM keeper/lock or, when available, our upgraded keeper/lock. It is not mandatory, but it is suggested, that any valve lock not be reused on performance applications due to material grooving

• Stem Diameter (mm)	Overall Length (mm)	Head Diameter (mm)
  5.5	105.85	30.00

When creating our new valve line we set out to create the best performance, longest lasting valves available to the aftermarket. Using advanced 3D design and simulation software, we have created a stronger and higher flowing valve head design. We flow test prototype valve heads in the specific applications to make sure we have the highest flowing valve head available on the market today. With the materials used, we have less valve distortion at the face than any of the tested designs. Less distortion allows for better sealing under extreme conditions and more consistent performance throughout the life of the valve. GSC Power-Division's new valves are sure to become the industry standard for sport compact performance valves. GSC Power Division Valve DOHC VTEC

Valve Features

• Swirl polished heads for smoother air flow over the valve

• Back cut to reduce valve weight for higher RPM, higher boost pressure, and allow for more aggressive cam profiles without increasing valve spring seat pressures

• Valve stems are micro polished to allow for less oil retention on the stem, which creates less drag on the stem to guide for a smoother motion

• Intake valves are a modified 21-4n stainless and exhausts are a modified 23-8n stainless material for high heat capacity while maintaining longevity

• Valve tips are either hardened or have a stelite wafer tip fused so that the tip is within 5 Rockwell C of the rocker or valve tappet for extended life and less wear

• Valve tip lengths - we have taken extra time to adjust tip heights on the applications to require less tipping of the valve, to maintain proper tip height for proper valve train geometry, and to cut down on install times when setting valve lash

• We have also adjusted the keeper groove to properly balance intake and exhaust spring pressures to reduce the use of valve spring shims and maximize performance from our spring and retainer kits

• Valves will work with an OEM keeper/lock or, when available, our upgraded keeper/lock. It is not mandatory, but it is suggested, that any valve lock not be reused on performance applications due to material grooving

GSC Power-Division Exhaust Valve Guide for 2008+ Dodge Viper

• Sold as set of 10 or individually 
• Oversized sold individually as +.001" and +.003"

GSC Power-Division Exhaust Valve Guide for 93-02 Dodge Viper

• Sold as set of 10 or individually
• Oversized sold individually as +.001" and +.003" 
• Please verify guide bore OD before purchasing. Dodge mixed valve guide sizes in the early 2000's 
  

GSC Power-Division Exhaust Valve Guide for BMW E92 335i N54//N55/S55

Standard sized sold as set of 12 or individually

Oversized sold individually as +.001" and +.003"

GSC Power-Division Exhaust Valve Guide for Dodge SRT4 GSC Power Division Exhaust Guide SRT4

• Standard sized sold as set of 8 or individually
• Oversized sold individually as +0.001" and +0.003" 

GSC Power-Division Exhaust Valve Guide for FA20 all (WRX/BRZ)

• Standard sized sold as set of 8 or individually
• Oversized sold individually as +0.001" and +0.003" 

GSC Power-Division Exhaust Valve Guide for Ford 4.6 Mustang, stopper style 

• Standard sized sold as set of 8 or individually
• Oversized sold individually as +0.001" and +0.003" 

GSC Power-Division Exhaust Valve Guide for Ford Mustang GT/GT500 5.4L DOHC

• Standard sized sold as set of 16 or individually 
• Oversized sold individually as +.001" and +.003"