My Account
My Garage
Shopping Cart

Shopping Cart

0 items in your Cart
View Cart
Subtotal
Track
My Order
MY GARAGE Select Vehicle
MY GARAGE

COMP Cams 54-471-11 LSR Hydraulic Roller Camshaft 239/255 Duration GM LS Rectangular Port

(Chevrolet Silverado 1500 1999-2013, Suburban 1500 2000-14, Camaro 2010-16, Corvette 2005-13, Silverado 2500 HD 2010-19, Tahoe 2000-14 + 55 more models)

Manufacturer

Picture for manufacturer COMP Cams

Part Number

54-471-11
6 reviews
Sale Price

$404.95

In Stock (8)

delivery box

Usually delivered within 2 days

free shipping

FREE SHIPPING

Check out with

ApplePay
Authorize Seller Badge
No Hassle Returns

No Hassle Returns

Live-in-stock inventory

Live-in-stock inventory

Fitment guaranteed

Fitment guaranteed

Product Details

The COMP Cams 54-471-11 is a hydraulic roller camshaft designed specifically for GM LS Gen III/IV rectangular port cylinder heads. This camshaft features a 239/255 duration profile that delivers excellent mid-range torque and strong top-end horsepower, making it ideal for street/strip applications and aggressive street builds.

Key Specifications:

  • Advertised Duration: 239°/255° (intake/exhaust)
  • Hydraulic roller design for reduced friction and improved valvetrain stability
  • Engineered for rectangular port LS cylinder heads
  • Compatible with GM LS Gen III and Gen IV engines
  • Requires aftermarket valve springs and supporting valvetrain components
  • Intended for use with performance computer calibration

Performance Characteristics:

  • Strong mid-range power delivery with excellent throttle response
  • Smooth idle quality suitable for street-driven vehicles
  • Works well with stock or ported rectangular port heads
  • Optimal power range for naturally aspirated street performance builds

This LSR (LS Rectangular) series camshaft is part of COMP Cams' proven line of LS engine performance camshafts. Professional installation and proper valvetrain setup with compatible springs, retainers, and pushrods is required for optimal performance and reliability.

Products specifications

Fits

Chevrolet Silverado 1500 1999-2013, Suburban 1500 2000-14, Camaro 2010-16, Corvette 2005-13, Silverado 2500 HD 2010-19, Tahoe 2000-14, Impala 2006-09, Colorado 2009-12, Trailblazer 2006-08, Caprice 2011-17, Monte Carlo 2006-07 + 50 more models

Advertised Exhaust Duration

305

Basic Operating RPM Range

2,400-7,200

Grind Number

289LRR HR14

Engine Family

GM LS GEN III/IV 3-Bolt 8 Cylinder (1997-2015)

Exhaust Valve Lift

0.624

Intake Valve Lift

0.624

Exhaust Duration at .050 inch Lift

255

MSE Process Video Link

https://www.youtube.com/watch?v=hTyIQxrPCCI

Camshaft Series

LSR Rectangular Port All Out Power

AMAZON ASIN

B001P1Z990

Assembly Lubricant Included

No

Lifters Included

No

Valve Springs Required

Yes

Prop 65

WARNING: Cancer and Reproductive Harm P65Warnings.ca.gov

C.A.R.B. Exempt for Foreign Vehicles Manufactured Before 1967?

Yes, but must meet tailpipe emission standards for year of vehicle.

C.A.R.B. Exempt for On-Road Vehicles?

No

C.A.R.B. Exempt for Racing and Off-Road Only Vehicles?

Yes, but must be a race/competition only vehicle.

C.A.R.B. Exempt for California Certified Vehicles Manufactured Before 1965?

Yes, but must meet tailpipe emission standards for year of vehicle.

C.A.R.B. Exempt for Federally Certified Vehicles Manufactured Before 1967?

Yes, but must meet tailpipe emission standards for year of vehicle.

Camshaft Gear Attachment

3-Bolt

LOBE SEPARATION

114

Lifter Type

Hydraulic Roller

Intake Duration at .050 Inch Lift

239

Cam Type

Hydraulic Roller

Camshaft Material

Billet Steel

Advertised Intake Duration

289

Autoplicity had the best price that I could find. The product was drop shipped from the factory and the time estimate that Autoplicity said was correct.

Nice company...Products are significantly cheaper than others and fast shipping.

Great product at a low price!

Thank you

Best price for brake pads on the web! Great product! Happy with this purchase

Purchased K&N Filter. Excellent price and received filter as scheduled.

Share icon
Return Policy
Returns are easy at Autoplicity

Not happy with a purchase? No problem. We've made returning items as easy as possible. And most purchases can be returned for free for 30 days. Learn more about our Returns Policy