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 54-703-11 Stage 2 Thumpr Hydraulic Roller Camshaft Gen IV LS Truck

(Chevrolet Silverado 1500 1999-2013, Suburban 1500 2000-14, Camaro 2010-16, Corvette 2005-13, Silverado 2500 HD 2009-19, Tahoe 2000-14 + 52 more models)

Manufacturer

Picture for manufacturer COMP Cams

Part Number

54-703-11
9 reviews
Sale Price

$404.95

In Stock (10+)

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 Stage 2 Thumpr camshaft is a high-performance hydraulic roller camshaft engineered specifically for Gen IV LS truck engines including 4.8L, 5.3L, and 6.0L displacements. This performance camshaft delivers the signature aggressive idle lope and exhaust note that made the Thumpr series famous, while providing substantial power gains throughout the RPM range.

Key Specifications:

  • Camshaft Type: Hydraulic Roller
  • Grind Number: 282LTH13
  • Duration at .050" Lift: 227° intake / 237° exhaust
  • Advertised Duration: 282° intake / 299° exhaust
  • Valve Lift: 0.614" intake / 0.612" exhaust
  • Lobe Separation Angle: 113°
  • Operating RPM Range: 1,800-6,600
  • Camshaft Gear Attachment: 3-Bolt
  • Material: Billet Steel

Performance Features:

  • Signature Thumpr lobe design produces aggressive idle characteristics and powerful exhaust note
  • Optimized profile blends early exhaust valve opening with long exhaust duration for maximum sound and performance
  • Generous intake and exhaust overlap creates distinctive rough idle without sacrificing power output
  • Provides substantial horsepower and torque gains over stock camshaft
  • Designed for street and performance applications

Installation Requirements:

  • High-lift valve springs required (not included)
  • Hydraulic roller lifters required (not included)
  • AFM (Active Fuel Management) delete required
  • VVT (Variable Valve Timing) delete required
  • Recommended upgraded rocker arms: COMP Cams 1477-16
  • Recommended camshaft installation kit: COMP Cams 5621

This camshaft is designed for off-road and racing use only. Compatible upgrade kits are available as CK54-703-11 (cam kit with valvetrain components) and MK54-703-11 (master kit with lifters and timing set). The Stage 2 Thumpr delivers a more aggressive profile than the Stage 1, making it ideal for enthusiasts seeking maximum sound and performance from their modified LS truck engine.

Products specifications

Fits

Chevrolet Silverado 1500 1999-2013, Suburban 1500 2000-14, Camaro 2010-16, Corvette 2005-13, Silverado 2500 HD 2009-19, Tahoe 2000-14, Impala 2006-09, Colorado 2009-12, Trailblazer 2006-09, Caprice 2011-16, Monte Carlo 2006-07 + 47 more models

Advertised Intake Duration

282

Basic Operating RPM Range

1,800-6,600

Engine Family

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

Exhaust Valve Lift

0.612

Intake Valve Lift

0.614

Recommended Upgraded Stock Rocker Arms

1477-16

Recommended Max-Lift BSR Shaft Rocker System

1981-16

Grind Number

282LTH13

Recommended Cam Install Kit

5621

AMAZON ASIN

B07M6297DT

CK-Kit Upgrade

CK54-703-11

MK-Kit Upgrade

MK54-703-11

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

113

Lifter Type

Hydraulic Roller

Exhaust Duration at .050 inch Lift

237

Intake Duration at .050 Inch Lift

227

Cam Type

Hydraulic Roller

Stage

2

Usage

Street / Performance

Camshaft Material

Billet Steel

Advertised Exhaust Duration

299

Camshaft Series

Thumpr NSR (No Springs Required)

Awsome!

thx!

Quick n easy

Was hard to checkout with PayPal something wrong with your site setup

Good prices and availability. easy to use web site.

Good but your shipping charge is too high .

smooth order ......So Far

Fast and Simple!

Good parts pricing compared to other parts suppliers.

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