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COMP Cams 54-475-11 LSR Hydraulic Roller Camshaft GM LS Gen III/IV - 255/271

(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

54-475-11
7 reviews
Sale Price

$497.95

Estimated ship date Tuesday, November 24

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Product Details

The COMP Cams 54-475-11 LSR (Lunati Street/Race) camshaft is a hydraulic roller design engineered specifically for GM LS Gen III and Gen IV rectangular port engines. With 255/271 duration specifications, this cam delivers an aggressive performance profile ideal for street/strip applications seeking increased mid-range to top-end power.

Key Features:

  • Hydraulic roller design for reduced friction and maintenance-free operation
  • 255/271 duration provides strong mid-range to high-RPM performance
  • Engineered for rectangular port LS cylinder heads
  • Compatible with GM LS Gen III and Gen IV engines
  • Excellent choice for performance street machines and weekend track cars
  • Maintains reasonable idle quality while delivering significant power gains

This camshaft is designed for enthusiasts looking to extract more performance from their LS platform while retaining hydraulic roller reliability. The rectangular port specification ensures proper valve lift and timing characteristics when paired with corresponding cylinder heads. Ideal for applications with upgraded valvetrain components, aftermarket intake systems, and performance exhaust.

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

321

Advertised Intake Duration

305

Basic Operating RPM Range

2,800-7,200

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

255

Exhaust Duration at .050 inch Lift

271

Grind Number

305LRR HR15

MSE Process Video Link

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

Camshaft Series

LSR Rectangular Port Large Displacement

AMAZON ASIN

B001P24PNK

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

Fast and easy. Shipping could have been less expensive but overall a good deal.

I had not shopped at Autoplicity before this purchase. Everything worked out great - product was delivered very quickly and exactly what I ordered. Thank you Autoplicity.

I ordered my K&N cold air intake order number 17133<br>From autoplicity for almost half price compared to other sites online. I will continue my purchases here n stop my searches elsewhere. And delivery time is fast!

Great Price! Fast Shipping!

Quick and efficient, Thank You!

Had to upgrade to a Snell 2010 helmet this year, bought the identical helmet for $200 less than I paid 8 years ago! Fast shipping, I will be checking Autoplicity first in the future!

best prices around !! Shipping was FAST !

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