Do I need to buy other camshafts to complete the installation?

Yes, this listing is for the right exhaust camshaft only. To complete a full camshaft upgrade for your engine, you will need to purchase the corresponding left exhaust camshaft and the intake camshafts separately.

What is the benefit of a billet camshaft over a stock one?

A billet camshaft is machined from a solid piece of steel, making it a stronger and more durable foundation compared to stock cams which might be cast or ground on a different core. This allows for more aggressive profiles and better longevity under demanding conditions.

Can this camshaft be used on a street-driven vehicle in California?

No, this camshaft is not CARB approved and cannot be legally shipped to California. It is intended for off-road use only.

GSC Power Division EJ257B S1 Exhaust Cam 7026S1REX

Name: GSC P-D 08+ STi EJ257B S1 Cams 266/264 Billet Right Exhaust Cam Only
Brand: GSC Power Division
SKU: gsc-power-division-gsc-p-d-08-sti-ej257b-s1-cams-266-264-billet-right-exhaust-ca-t14-459323
Price: 291.46 USD
Availability: BackOrder

GSC P-D 08+ STi EJ257B S1 Cams 266/264 Billet Right Exhaust Cam Only

$291.46

On Backorder

Order now to reserve yours — we'll ship as soon as stock arrives. Full refund if we're unable to fulfill.

GSC P-D 08+ STi EJ257B S1 Cams 266/264 Billet Right Exhaust Cam Only

Key Features

Fits 2008 and later Subaru STI EJ257B engines.
This listing is for the right exhaust camshaft only.
Features a 266 degree intake duration and 264 degree exhaust duration.
Offers 9.5mm of lift.
Constructed from a solid billet core for strength.
Not CARB approved; cannot ship to California.

This camshaft is designed for 2008 and later Subaru STI EJ257B engines. Please verify fitment with your specific vehicle's engine code.

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Product Details

If you're looking to get more out of your 2008 and later Subaru STI's EJ257 engine, especially if you're rebuilding the top end or aiming for improved performance, this GSC Power Division S1 camshaft is a solid option. This is a right-side exhaust camshaft, designed to work with the factory exhaust cam gear and other stock components, making it a focused upgrade for that specific cylinder head.

This camshaft is made from a solid billet core, which is a strong foundation for performance grinds. The S1 profile features 266 degrees of duration on the intake side and 264 degrees on the exhaust side, with a lift of 9.5mm. This particular listing is for the right exhaust cam only, so you'll need to purchase the corresponding left exhaust cam and intake cams separately if you're doing a full set. It's a well-built piece that can help your engine breathe better, especially when paired with other supporting modifications.

Keep in mind that this camshaft is not CARB approved and cannot be shipped to California. It's designed for off-road use and is a component that requires careful installation by someone familiar with Subaru EJ engines to ensure proper valve timing and function.