Engines and Components› Camshafts and Valvetrain

COMP Cams

ENGINE CONTROL SYSTEM, XFI STREET

$861.62

SKU: C007 304003

Special Order
Special Order
Ships in 4–6 weeks
Free Shipping
Non-Returnable Item
INSTALL DIFFICULTY
DIY PRO SHOP

Moderate — 2–4 hours

Description

The COMP Cams 4003 Rev Kit is an engine valvetrain component designed for Big Block Chevrolet engines to maintain consistent lifter-to-camshaft contact at high engine RPMs. It includes a support bar, bushings, and springs to prevent valve float, improving high-RPM performance and stability.

Fitment

Fitment Guaranteed

Don’t gamble
on fit.

Log your build in the MOTORMIA app and we’ll guarantee this part fits your exact setup — or your money back, return shipping covered.

Available on iOS & Android

Specifications

BrandCOMP Cams
Part NumberC007 304003

Videos

XFI Tuning Overview

XFI Tuning Overview
Inside The New FAST™ XFI 2.0™ EFI System

Inside The New FAST™ XFI 2.0™ EFI System
FAST Quick Tech Video: Updating XFI From 2.010 to 2.051 Software

FAST Quick Tech Video: Updating XFI From 2.010 to 2.051 Software
Rev kit spring install

Rev kit spring install
Installing the FAST EZ EFI

Installing the FAST EZ EFI
FAST EZ-EFI Installation

FAST EZ-EFI Installation
FAST introduces their new EZ-EFI 2.0

FAST introduces their new EZ-EFI 2.0
StreetLegalTV - FAST EZ EFI Video Feature

StreetLegalTV - FAST EZ EFI Video Feature
Installing FAST EZ-Fuel EFI

Installing FAST EZ-Fuel EFI

Buy with Confidence

Built for enthusiasts. Every order is backed by our 30 day return window on eligible items. Unused and uninstalled products may be returned with approved RMA and no restocking fees when received in new condition. Orders placed through the MOTORMIA app with a complete build qualify for our Fitment Guarantee — free return shipping if the part doesn’t fit your exact setup. The guarantee covers fit only; installation must follow manufacturer instructions, and we recommend a qualified shop for parts marked Difficulty 4–5.

View Full Return Policy