The Texas Speed Stage 1 Cathedral NA Camshaft is the entry point in the Texas Speed Cathedral NA lineup for naturally aspirated Gen III and Gen IV cathedral-port LS engines. It is aimed at daily-driven cars and trucks that want more horsepower and torque with a noticeable performance idle while keeping factory torque converter compatibility on 5.7L and 6.0L combinations.
The grind runs 216/232 duration at .050", .600"/.600" lift, a 112 degree lobe separation angle and a 108 degree intake centerline, with a tested powerband of 3,000 to 6,900 rpm. On a 6.0L LS test engine the Stage 1 made 479 peak horsepower and gained 68 horsepower and 27 lb-ft over the stock LS6 camshaft. Texas Speed develops its lobes in-house and verifies valvetrain stability on a Spintron. Upgraded valve springs rated for .600" lift and a professional ECU tune are required, and hardened chromoly pushrods are recommended.
Specifications
- Duration at .050": 216/232
- Valve lift: .600"/.600"
- Lobe separation angle: 112 degrees
- Intake centerline: 108 degrees
- Engines: Gen III and Gen IV cathedral-port 4.8L, 5.3L, 5.7L and 6.0L LS, naturally aspirated
- Tested rpm range: 3,000 to 6,900 rpm
- Torque converter: Stock converter compatible on 5.7L and 6.0L
- Valve springs: Upgraded springs rated for .600" lift required
- Pushrods: Hardened chromoly pushrods recommended
- Vehicle usage: Daily driver / friendly
- Chop level: Mild chop
- Dyno test engine: 6.0L LS versus stock LS6 camshaft
- Tested gains: +68 hp, +27 lb-ft; 479 hp at 6,000 rpm, 480 lb-ft at 4,800 rpm
- Average output on test engine: 409 hp, 440 lb-ft; idle vacuum 42 kPa
Note: Professional ECU tuning is required after installation.
Note: Pushrod length and piston-to-valve clearance should be verified during installation.
Note: Dyno results will vary with the complete engine combination, supporting modifications, fuel, test conditions and calibration.
Vehicle Applications
Engine families covered: Gen III and Gen IV LS 4.8L, 5.3L, 5.7L and 6.0L with cathedral-port cylinder heads, naturally aspirated. Vehicles in the list equipped with rectangular-port 6.2L engines are not applicable.
Chevrolet Camaro
- 1998 Chevrolet Camaro
- 1999 Chevrolet Camaro
- 2000 Chevrolet Camaro
- 2001 Chevrolet Camaro
- 2002 Chevrolet Camaro
Chevrolet Colorado
- 2009 Chevrolet Colorado
- 2010 Chevrolet Colorado
- 2011 Chevrolet Colorado
- 2012 Chevrolet Colorado
Chevrolet Corvette
- 1997 Chevrolet Corvette
- 1998 Chevrolet Corvette
- 1999 Chevrolet Corvette
- 2000 Chevrolet Corvette
- 2001 Chevrolet Corvette
- 2002 Chevrolet Corvette
- 2003 Chevrolet Corvette
- 2004 Chevrolet Corvette
- 2005 Chevrolet Corvette
- 2006 Chevrolet Corvette
- 2007 Chevrolet Corvette
Cadillac Escalade
- 2002 Cadillac Escalade
- 2003 Cadillac Escalade
- 2004 Cadillac Escalade
- 2005 Cadillac Escalade
- 2006 Cadillac Escalade
- 2009 Cadillac Escalade
- 2010 Cadillac Escalade
- 2011 Cadillac Escalade
- 2012 Cadillac Escalade
- 2013 Cadillac Escalade
Pontiac Firebird
- 1998 Pontiac Firebird
- 1999 Pontiac Firebird
- 2000 Pontiac Firebird
- 2001 Pontiac Firebird
- 2002 Pontiac Firebird
Pontiac Firebird Formula
- 1998 Pontiac Firebird Formula
- 1999 Pontiac Firebird Formula
- 2000 Pontiac Firebird Formula
- 2001 Pontiac Firebird Formula
- 2002 Pontiac Firebird Formula
Pontiac Grand Prix
- 2005 Pontiac Grand Prix
- 2006 Pontiac Grand Prix
- 2007 Pontiac Grand Prix
- 2008 Pontiac Grand Prix
Pontiac GTO
- 2004 Pontiac GTO
- 2005 Pontiac GTO
- 2006 Pontiac GTO
Chevrolet Impala SS
- 2006 Chevrolet Impala SS
- 2007 Chevrolet Impala SS
- 2008 Chevrolet Impala SS
- 2009 Chevrolet Impala SS
Chevrolet Monte Carlo
- 2006 Chevrolet Monte Carlo
- 2007 Chevrolet Monte Carlo
GMC Sierra 1500
- 1999 GMC Sierra 1500
- 2000 GMC Sierra 1500
- 2001 GMC Sierra 1500
- 2002 GMC Sierra 1500
- 2003 GMC Sierra 1500
- 2004 GMC Sierra 1500
- 2005 GMC Sierra 1500
- 2006 GMC Sierra 1500
- 2007 GMC Sierra 1500
- 2008 GMC Sierra 1500
- 2009 GMC Sierra 1500
- 2010 GMC Sierra 1500
- 2011 GMC Sierra 1500
- 2012 GMC Sierra 1500
- 2013 GMC Sierra 1500
GMC Sierra 2500
- 2001 GMC Sierra 2500
- 2002 GMC Sierra 2500
- 2003 GMC Sierra 2500
- 2004 GMC Sierra 2500
- 2005 GMC Sierra 2500
- 2006 GMC Sierra 2500
- 2007 GMC Sierra 2500
GMC Sierra 3500
- 2001 GMC Sierra 3500
- 2002 GMC Sierra 3500
- 2003 GMC Sierra 3500
- 2004 GMC Sierra 3500
- 2005 GMC Sierra 3500
- 2006 GMC Sierra 3500
Chevrolet Silverado 1500
- 1999 Chevrolet Silverado 1500
- 2000 Chevrolet Silverado 1500
- 2001 Chevrolet Silverado 1500
- 2002 Chevrolet Silverado 1500
- 2003 Chevrolet Silverado 1500
- 2004 Chevrolet Silverado 1500
- 2005 Chevrolet Silverado 1500
- 2006 Chevrolet Silverado 1500
- 2007 Chevrolet Silverado 1500
- 2008 Chevrolet Silverado 1500
- 2009 Chevrolet Silverado 1500
- 2010 Chevrolet Silverado 1500
- 2011 Chevrolet Silverado 1500
- 2012 Chevrolet Silverado 1500
- 2013 Chevrolet Silverado 1500
Chevrolet Silverado 2500
- 1999 Chevrolet Silverado 2500
- 2000 Chevrolet Silverado 2500
- 2001 Chevrolet Silverado 2500
- 2002 Chevrolet Silverado 2500
- 2003 Chevrolet Silverado 2500
- 2004 Chevrolet Silverado 2500
- 2005 Chevrolet Silverado 2500
- 2006 Chevrolet Silverado 2500
- 2007 Chevrolet Silverado 2500
Chevrolet Silverado 3500
- 2001 Chevrolet Silverado 3500
- 2002 Chevrolet Silverado 3500
- 2003 Chevrolet Silverado 3500
- 2004 Chevrolet Silverado 3500
- 2005 Chevrolet Silverado 3500
- 2006 Chevrolet Silverado 3500
- 2007 Chevrolet Silverado 3500
Chevrolet Suburban
- 2000 Chevrolet Suburban
- 2001 Chevrolet Suburban
- 2002 Chevrolet Suburban
- 2003 Chevrolet Suburban
- 2004 Chevrolet Suburban
- 2005 Chevrolet Suburban
- 2006 Chevrolet Suburban
- 2007 Chevrolet Suburban
- 2008 Chevrolet Suburban
- 2009 Chevrolet Suburban
- 2010 Chevrolet Suburban
- 2011 Chevrolet Suburban
- 2012 Chevrolet Suburban
- 2013 Chevrolet Suburban
- 2014 Chevrolet Suburban
Chevrolet Suburban 2500
- 2000 Chevrolet Suburban 2500
- 2001 Chevrolet Suburban 2500
- 2002 Chevrolet Suburban 2500
- 2003 Chevrolet Suburban 2500
- 2004 Chevrolet Suburban 2500
- 2005 Chevrolet Suburban 2500
- 2006 Chevrolet Suburban 2500
Chevrolet Tahoe
- 2000 Chevrolet Tahoe
- 2001 Chevrolet Tahoe
- 2002 Chevrolet Tahoe
- 2003 Chevrolet Tahoe
- 2004 Chevrolet Tahoe
- 2005 Chevrolet Tahoe
- 2006 Chevrolet Tahoe
- 2007 Chevrolet Tahoe
- 2008 Chevrolet Tahoe
- 2009 Chevrolet Tahoe
- 2010 Chevrolet Tahoe
- 2011 Chevrolet Tahoe
- 2012 Chevrolet Tahoe
- 2013 Chevrolet Tahoe
- 2014 Chevrolet Tahoe
Chevrolet Trailblazer SS
- 2006 Chevrolet Trailblazer SS
- 2007 Chevrolet Trailblazer SS
- 2008 Chevrolet Trailblazer SS
- 2009 Chevrolet Trailblazer SS
Pontiac Trans Am
- 1998 Pontiac Trans Am
- 1999 Pontiac Trans Am
- 2000 Pontiac Trans Am
- 2001 Pontiac Trans Am
- 2002 Pontiac Trans Am
GMC Yukon
- 2000 GMC Yukon
- 2001 GMC Yukon
- 2002 GMC Yukon
- 2003 GMC Yukon
- 2004 GMC Yukon
- 2005 GMC Yukon
- 2006 GMC Yukon
- 2007 GMC Yukon
- 2008 GMC Yukon
- 2009 GMC Yukon
- 2010 GMC Yukon
- 2011 GMC Yukon
- 2012 GMC Yukon
- 2013 GMC Yukon
- 2014 GMC Yukon
GMC Yukon XL 2500
- 2000 GMC Yukon XL 2500
- 2001 GMC Yukon XL 2500
- 2002 GMC Yukon XL 2500
- 2003 GMC Yukon XL 2500
- 2004 GMC Yukon XL 2500
- 2005 GMC Yukon XL 2500
- 2006 GMC Yukon XL 2500
Vehicle applications reflect the fitment published by Texas Speed & Performance for this part number. Confirm your engine and cylinder head configuration before ordering.
FAQ
What engines does the Texas Speed Stage 1 Cathedral NA Camshaft fit?
The Stage 1 Cathedral NA cam fits naturally aspirated Gen III and Gen IV LS engines with cathedral-port cylinder heads, meaning the 4.8L, 5.3L, 5.7L and 6.0L found in 1997 to 2013 GM cars, trucks and SUVs.
Do I need an aftermarket torque converter with the Stage 1 cam?
No. Texas Speed designed the Stage 1 to work with the factory torque converter on 5.7L and 6.0L combinations, which is why it is the recommended choice for stock-converter daily drivers in the Cathedral NA lineup.
What valve springs are required for the Stage 1 Cathedral NA cam?
Upgraded valve springs rated for .600" lift are required. Texas Speed also recommends hardened chromoly pushrods, and pushrod length and piston-to-valve clearance should be checked during installation.
How much power does the Stage 1 Cathedral NA cam add?
On a 6.0L LS test engine, Texas Speed measured 479 peak horsepower at 6,000 rpm and 480 lb-ft at 4,800 rpm, a gain of 68 horsepower and 27 lb-ft over the stock LS6 camshaft. Results depend on the rest of the combination and tuning.
How does the Stage 1 compare to the Stage 2, 3 and 4 Cathedral NA cams?
The Stage 1 is the mildest of the four with 216/232 duration, the smoothest idle and stock converter compatibility. Stage 2 (221/236) and Stage 3 (228/242) add peak power and need a 2,800 or 3,200 rpm converter, and Stage 4 (232/247) is the most aggressive for maximum naturally aspirated output.
Is tuning required after installing this camshaft?
Yes. Texas Speed requires professional ECU tuning after installation so the engine idles, drives and makes power correctly with the new camshaft profile.
