Texas Speed Stage 2 Cathedral NA Camshaft

221/236 .629"/.615" | 112 LSA | 109 ICL

Overview

The Texas Speed Stage 2 Cathedral NA Camshaft is the next step up from our Stage 1, delivering more peak horsepower while maintaining excellent street manners. Compatible with naturally aspirated 4.8L, 5.3L, 5.7L, and 6.0L cathedral-port LS engines, it is an outstanding choice for enthusiasts looking for a more aggressive cam without giving up everyday drivability.

Featuring 221/236 duration, .629"/.615" lift, a 112 LSA, and 109 ICL, the Stage 2 offers a harder-hitting midrange, stronger top-end pull, and a noticeably more aggressive idle than Stage 1.

On our 6.0L LS dyno engine, the Stage 2 produced 491 peak horsepower while gaining 80 horsepower and 26 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	221° / 236°
Valve Lift	.629" / .615"
LSA / ICL	112 LSA / 109 ICL
Tested RPM Range	3,000-7,000 RPM
Torque Converter	2,800+ 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 2 strikes an excellent balance between street manners and increased horsepower, making it one of the most versatile cams in the lineup.

Dyno Results

Horsepower Gain	+80 HP
Torque Gain	+26 lb-ft
Peak Horsepower	491 HP at 6,200 RPM
Peak Torque	479 lb-ft at 4,900 RPM
Average Horsepower	414 HP
Average Torque	440 lb-ft
Idle Vacuum	48 kPa

Compare the Cathedral NA Lineup

Stage 1: Best for stock-converter daily drivers	View Stage 1
Stage 2 — Current Product Best all-around street cam	You Are Here
Stage 3: Best street/strip cam	View Stage 3
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 2,800 RPM or higher torque converter is recommended for automatic transmission applications.
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.