What is included in this COMP Cams camshaft kit?

This kit is comprehensive and includes the XR277HR-12 camshaft, hydraulic roller lifters, valve springs, retainers, valve locks, valve stem seals, and a timing chain set. It also comes with assembly lube and decals.

Do I need to tune my vehicle's computer after installing this camshaft?

Yes, this camshaft requires an engine programmer to adjust your vehicle's computer settings. This ensures the engine runs correctly with the new camshaft specifications.

Is this camshaft kit compatible with all LS engines?

This kit is specifically designed for GM LS GEN III and GEN IV engines, covering displacements from 4.8L to 7.0L. While it fits many vehicles, grinds are specific to displacement and cylinder head design, so always verify fitment for your exact application.

COMP Cams Camshaft Kit XR277HR-12 K54-418-11

Name: COMP Cams Camshaft Kit LS1 XR277HR-12
Brand: COMP Cams
Price: 1243.97 USD
Availability: InStock

COMP Cams Camshaft Kit LS1 XR277HR-12

$1243.97

On Backorder

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

COMP Cams Camshaft Kit LS1 XR277HR-12. This kit upgrades your GM LS engine for improved street and strip performance.

Key Features

Fits 54+ vehicle make/model combinations with GM LS GEN III/IV engines.
Includes camshaft, lifters, valve springs, retainers, valve locks, valve stem seals, and timing chain set.
Designed as a street/strip camshaft for improved performance.
Works well with FAST LSX intake manifolds.
Requires an engine programmer for proper operation.
COMP Cams is a well-known brand in performance engine components.

⚠️ CA WARNING: This product can expose you to chemicals known to the State of California to cause cancer and/or birth defects or other reproductive harm. Learn more

Secure CheckoutFast Shipping631-982-0042

Will this fit your vehicle?

Product Details

If you're looking to get more power out of your GM LS-based engine, this COMP Cams XR277HR-12 camshaft kit is a solid option. It's designed for street and strip use, and it works well with intake manifolds like the FAST LSX. This kit is built to give your engine a noticeable bump in performance, especially in the mid-range and upper RPMs, making it great for modified vehicles. It's compatible with a wide range of GM LS engines, including popular applications like the Chevrolet Camaro, Corvette, and Silverado trucks, as well as Cadillac CTS and Buick LaCrosse models.

This isn't just a camshaft; it's a complete package to ensure a proper installation and optimal performance. Inside the box, you'll find the camshaft itself, along with hydraulic roller lifters, valve springs, retainers, valve locks, and valve stem seals. COMP Cams also includes a timing chain set to make sure your engine's timing is spot on with the new cam. For those working on older LS engines, it even includes assembly lube and decals. You will need a programmer to adjust your engine's computer for the new camshaft specifications.

When you're building an engine for performance, using a matched set of components like this kit is crucial. It takes the guesswork out of selecting compatible parts. Just remember that this kit is not CARB approved and cannot be shipped to California. Always refer to the included instructions for the best installation results.