Texas Speed Stage 3 Cathedral NA Camshaft

228/242 .629"/.615" | 112 LSA | 109 ICL

Overview

The Texas Speed Stage 3 Cathedral NA Camshaft is designed for naturally aspirated cathedral-port LS engines that demand serious street and street/strip performance. Compatible with 4.8L, 5.3L, 5.7L, and 6.0L combinations, the Stage 3 moves the powerband higher in the RPM range while delivering an aggressive idle and outstanding top-end horsepower.

Featuring 228/242 duration, .629"/.615" lift, a 112 LSA, and 109 ICL, the Stage 3 is ideal for customers looking for more performance than Stage 2 while maintaining excellent drivability with the proper supporting components.

On our 6.0L LS dyno engine, the Stage 3 produced 498 peak horsepower while gaining 87 horsepower and 25 lb-ft of torque over the stock LS6 camshaft.

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	228° / 242°
Valve Lift	.629" / .615"
LSA / ICL	112 LSA / 109 ICL
Tested RPM Range	3,000-7,000 RPM
Torque Converter	3,200+ RPM Recommended (2,800+ for Most 6.0L Combinations)

Dyno Comparison

The graph below compares the Texas Speed Stage 1 through Stage 4 Cathedral NA camshafts against the stock LS6 camshaft. The Stage 3 offers an excellent balance of aggressive street manners and high-RPM performance, making it a favorite for serious naturally aspirated builds.

Dyno Results

Horsepower Gain	+87 HP
Torque Gain	+25 lb-ft
Peak Horsepower	498 HP at 6,100 RPM
Peak Torque	478 lb-ft at 4,900 RPM
Average Horsepower	415 HP
Average Torque	440 lb-ft
Idle Vacuum	51 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 — Current Product Best street/strip cam	You Are Here
Stage 4: Maximum naturally aspirated performance	View Stage 4

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 for most applications; a 2,800 RPM or higher converter may be suitable for many 6.0L combinations.
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.