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Description
GSC 4B11 Conical Valve Spring Kit for Evo XThe GSC Power Division high pressure conical valve spring with titanium retainers for the Evo X includes a full set of 16 titanium retainers, 16 conical valve springs and 16 valve spring seats. Vehicle Fitment: Mitsubishi 4B11T2008 2015 Evolution X IN: 112 lbs @ 1. 294" EX: 110 lbs @ 1. 300" install height IN: 259 lbs @ 0. 849" EX: 257 lbs @ 0. 855" Up to 11. 30mm lift camsIncludes:(16) Beehive Valve Springs(16) Titanium Retainers(16) Valve Spring
The GSC Power-Division high pressure conical valve spring with titanium retainers for the Evo X includes a full set of 16 titanium retainers, 16 conical valve springs and 16 valve spring seats.Vehicle Fitment:
Mitsubishi 4B11T
2008-2015 Evolution X
• IN: 112 lbs @ 1.294" / EX: 110 lbs @ 1.300" install height
• IN: 259 lbs @ 0.849" / EX: 257 lbs @ 0.855"
• Up to 11.30mm lift cams
Includes:
(16) Beehive Valve Springs
(16) Titanium Retainers
(16) Valve Spring Seats
More Info:
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.
| Part Number: | GSC5062 |
| Springs: | Conical |
| Retainers: | Titanium |
| Coil Bind: | 0.818" |
| Install Height: | 1.294 / 1.300" |
| Seat Pressure: | 112 / 110 lbs |
| Open Pressure, 11.30mm Lift: |
259lbs @ 0.849" 257lbs @ 0.855" |
| Maximum Valve Lift: | 0.437" |
| Max RPM: | 11,000 |
| Max Boost: | 55 psi |
Shipping Notes
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Exchange/Return Notes
- We offer a 30-day return/exchange service after receiving.
- Final sale items are not eligible for returns or exchanges.
- To process your return/exchange, please contact us at [email protected]
- Please click here for more details>>> Return & Exchange Policy
4.5 ★★★★★
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Product Reviews
★★★★★ 5
12 year old lab loves these
Color: Pink Pig
I have a 12 year old lab that things she’s still a puppy. She’s always been a chewer and these have held up surprisingly well. They’re the perfect size for my big lab and so far they’re all in one piece.
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Reviewed in the United States on November 6, 2025
★★★★★ 3
The size
It's very small.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on May 31, 2025
★★★★★ 1
Octopus toy-Do not buy
Worst toy ever. Not worth $.25 at this point in life. I strongly suggest you do not buy from this company and you do not buy this toy. It will be a waste of everyone’s time crappy product.
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Reviewed in the United States on September 16, 2025
★★★★★ 5
Easy for a small dog to pick up and run with
Color: Red Fries
The perfect addition for the dog that has a hamburger hot dog pizza toys and needed fries. But seriously this item is perfect for small dogs.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on December 2, 2025
★★★★★ 5
Fly fishing dog in training
This thing is so dang cute! It’s proven to be durable for my small dog, too. He drags it all around inside and outside and it’s no worse for the west.
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Reviewed in the United States on September 21, 2023