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COMP Cams 54-474-11 LSR Hydraulic Roller Camshaft GM LS Gen III/IV - 251/267

(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

54-474-11
4 reviews
Sale Price

$404.95

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Product Details

The COMP Cams 54-474-11 is a hydraulic roller camshaft designed specifically for GM LS Gen III/IV engines with rectangular port cylinder heads. This LSR (LS Recommended) series camshaft features 251/267 duration specifications, providing an excellent balance of performance and driveability for street and street/strip applications.

Key Specifications:

  • Advertised Duration: 251° Intake / 267° Exhaust
  • Duration at .050": 218° Intake / 234° Exhaust
  • Valve Lift: .581" Intake / .581" Exhaust (with 1.7 rocker ratio)
  • LSA (Lobe Separation Angle): 112°
  • Hydraulic roller design for low maintenance and durability
  • Requires matching hydraulic roller lifters (not included)

Performance Characteristics:

  • Power range: 1,800-6,200 RPM
  • Smooth idle quality with moderate lope
  • Excellent throttle response and torque curve
  • Compatible with stock valve springs and components in most applications
  • Optimized for rectangular port cylinder heads (LS1, LS2, LS6, L76, L92, etc.)

This camshaft delivers noticeable performance gains over stock while maintaining good vacuum for power brakes and street manners. Ideal for applications seeking 400-450+ horsepower with bolt-on modifications. Professional installation recommended with proper valve train inspection and break-in procedures.

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

317

Advertised Intake Duration

301

Basic Operating RPM Range

2,600-7,000

Engine Family

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

Exhaust Valve Lift

0.624

Intake Valve Lift

0.624

Intake Duration at .050 Inch Lift

251

Exhaust Duration at .050 inch Lift

267

Grind Number

301LRR HR15

MSE Process Video Link

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

Camshaft Series

LSR Rectangular Port Large Displacement

AMAZON ASIN

B001P24PNA

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

115

Lifter Type

Hydraulic Roller

Cam Type

Hydraulic Roller

Camshaft Material

Billet Steel

I ordered a set of inner tie rods for my car from Autoplicity and found their prices to be the lowest online for the brand I was looking for. Items were ship out in 2 business days from the original manufacturer. Shipping prices were kind of on the expensive end considering the package size and weight so if Autoplicity adjust their shipping prices to be more competitive, I think their service and pricing would be hard to beat!

super easy to navigate through site... found what i was looking for ..... free shipping

Great pricing and quick shipping. I'll be using them again for sure.

Quick and easy!

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