Texas Speed Stage 4 Cathedral NA Camshaft

232/247 .644"/.632" | 111 LSA | 108 ICL

Overview

The Texas Speed Stage 4 Cathedral NA Camshaft is the flagship naturally aspirated camshaft in our Cathedral NA lineup. Designed for aggressive street, street/strip, and race-oriented builds, it delivers the strongest top-end power and most aggressive idle of the four camshafts while rewarding combinations with the airflow and supporting components to take advantage of its high-RPM powerband.

Featuring 232/247 duration, .644"/.632" lift, a 111 LSA, and 108 ICL, the Stage 4 is ideal for naturally aspirated 4.8L, 5.3L, 5.7L, and 6.0L cathedral-port LS engines looking to maximize horsepower.

On our 6.0L LS dyno engine, the Stage 4 produced 509 peak horsepower while gaining 98 horsepower and 28 lb-ft of torque over the stock LS6 camshaft. It also delivered the highest average horsepower and torque of the entire Cathedral NA lineup.

Developed In-House by Texas Speed

Texas Speed camshafts are developed using our internal lobe-design process, allowing our engineering team to match the valve events and lobe profiles to the intended engine displacement, cylinder-head airflow, operating range, and performance goals.

Camshaft and valvetrain behavior is evaluated through Spintron testing to help verify stability and valve control throughout the intended RPM range. This in-house development process allows Texas Speed to create purpose-built camshafts instead of relying on generic lobe combinations.

Camshaft Specifications

Duration	232° / 247°
Valve Lift	.644" / .632"
LSA / ICL	111 LSA / 108 ICL
Tested RPM Range	3,000-7,000 RPM
Torque Converter	3,200+ RPM Recommended

Dyno Comparison

The graph below compares the Texas Speed Stage 1 through Stage 4 Cathedral NA camshafts against the stock LS6 camshaft. The Stage 4 delivers the highest peak horsepower, highest average horsepower, and strongest overall naturally aspirated performance in the Cathedral NA lineup.

Dyno Results

Horsepower Gain	+98 HP
Torque Gain	+28 lb-ft
Peak Horsepower	509 HP at 6,300 RPM
Peak Torque	481 lb-ft at 4,800 RPM
Average Horsepower	418 HP
Average Torque	443 lb-ft
Idle Vacuum	58 kPa

Compare the Cathedral NA Lineup

Stage 1: Best for stock-converter daily drivers	View Stage 1
Stage 2: Best all-around street cam	View Stage 2
Stage 3: Best street/strip cam	View Stage 3
Stage 4 — Current Product Maximum naturally aspirated performance	You Are Here

Fitment & Important Notes

Fits Gen III and Gen IV cathedral-port 4.8L, 5.3L, 5.7L, and 6.0L LS engines.
Designed for naturally aspirated applications.
Upgraded valve springs are required.
Hardened chromoly pushrods are recommended.
Professional ECU tuning is required.
A 3,200 RPM or higher torque converter is recommended.
Pushrod length and piston-to-valve clearance should always be verified during installation.

Dyno testing was performed on a 6.0L LS engine against a stock LS6 camshaft. Results will vary based on the complete engine combination, supporting modifications, fuel, testing conditions, and calibration.