# COMP Cams Rocker Arms GM LS1 1.8 3/8 Ultra

Ultra Pro Magnumâ„¢ Roller Rocker Arms not only live up to the lofty standards of the original Pro Magnums but they also take Stud mount Rocker performance, stability and value to a whole new level. The 8650 chromemoly material and arched, web-like design deliver increased strength and rigidity while still reducing the moment of inertia and optimizing the dynamic balance. A unique black oxide exterior finish helps prevent corrosion and increases durability. Featuring Oversized trunnions, precision-sorted needle bearings and hardened Roller tips for the ultimate in performance and dependability. Optimized retainer and valve spring clearances allow for use of most diameter springs, retainers and +.050" locks without clearance or fitment issues.GM LS Engines - LS1/LS2/LS6 Style Heads - 3/8" Stud - 1.8 RatioInvestment cast 8650 chromemoly body and arched, web-like design deliver increased strength and rigidity while still reducing the moment of inertia. Unique black oxide exterior finish helps prevent corrosion and increases durability.Optimized retainer and valve spring clearances allow for use of most diameter springs, retainers and +.050" locks without clearance or fitment issues.Feature Oversized trunnions, precision-sorted needle bearings and hardened Roller tips.Lifetime Warranty - So strong that we guarantee the Rocker bodies against breakage for life. For use with up to 850 lbs of open spring pressure.

This Part Fits:

Year

Make

Model

Submodel

2004-2005

Cadillac

CTS

V

1998-2002

Chevrolet

Camaro

Z28

1998-2002

Chevrolet

Camaro

Z28 SS

2003

Chevrolet

Corvette

50th Anniversary Edition

2003

Chevrolet

Corvette

50th Anniversary Edition Pace Car

1997-2004

Chevrolet

Corvette

Base

1998

Chevrolet

Corvette

Indianapolis 500 Pace Car

2001-2004

Chevrolet

Corvette

Z06

2006-2009

Chevrolet

Trailblazer

SS

1998-2002

Pontiac

Firebird

Formula

1998-2002

Pontiac

Firebird

Trans Am

2004

Pontiac

GTO

Base

## Details

- **Price:** 464.26 CAD
- **Vendor:** COMP Cams
- **Type:** Rocker Arms

## Variants

| Variant | Price | Available |
|---------|-------|-----------|
| Default Title | 464.26 CAD | In stock |

## Images

- Photo - Primary
- Photo - Primary
- Logo Image

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> Source: [Standard Auto Part](https://www.standardautopart.com/products/comp-cams-rocker-arms-gm-ls1-1-8-3-8-ultra-1)
> Updated: 2026-06-27