The Texas Speed Chopacabra Camshaft, Cathedral-Port 6.0L Edition is a version of the Chopacabra grind sized for stock 6.0L LS engines running cathedral-port cylinder heads such as the 317, 243 and 799 castings. It keeps the 108 degree lobe separation and maximum overlap that give the Chopacabra family its signature lope while adding duration over the 4.8L/5.3L version, so a 6.0L truck or street build gets the aggressive idle along with strong midrange power.
Texas Speed designed this cam to work with factory-style parts. LS6-style valve springs or better are required, stock-length pushrods are the design target (always measure for preload), and it runs on a stock torque converter, although Texas Speed recommends a 2,600 rpm or higher stall for peak performance. The cam was dyno tested on a 10:1 compression 370 cubic inch LQ4-based engine with stock 317 heads, LS6-style springs, a stock TBSS/NNBS intake and 93 octane pump gas. A custom tune is required after installing any aftermarket camshaft.
Specifications
- Duration at .050": 220/228
- Valve lift: .550"/.550"
- Lobe separation angle: 108 degrees
- Intake centerline: 106 degrees (108+2)
- Overlap: Maximum, built to lope
- Engines: 6.0L LS-based engines with cathedral-port cylinder heads (317, 243, 799 and similar)
- Valve springs: LS6-style springs or better required
- Pushrods: Designed for stock-length pushrods; measure for proper preload
- Torque converter: Compatible with stock converter; 2,600+ stall recommended for peak performance
- Vehicle usage: Street performance, mid-range
- Chop level: Choppy
- Dyno test engine: 370 CID LQ4-based build, 10:1 compression, stock 317 cathedral-port heads, LS6-style springs, stock TBSS/NNBS intake, 93 octane
Vehicle Applications
Engine family covered: 6.0L cathedral-port LS (LQ4, LQ9, LS2, LY6 and similar 6.0L engines with cathedral-port heads). This edition is not for 4.8L, 5.3L or 5.7L engines; Texas Speed sells a separate Chopacabra grind for those.
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 CTS-V
- 2004 Cadillac CTS-V
- 2005 Cadillac CTS-V
- 2006 Cadillac CTS-V
- 2007 Cadillac CTS-V
Cadillac Escalade
- 2002 Cadillac Escalade
- 2003 Cadillac Escalade
- 2004 Cadillac Escalade
- 2005 Cadillac Escalade
- 2006 Cadillac Escalade
- 2008 Cadillac Escalade
- 2009 Cadillac Escalade
- 2010 Cadillac Escalade
- 2011 Cadillac Escalade
- 2012 Cadillac Escalade
- 2013 Cadillac Escalade
- 2014 Cadillac Escalade
Pontiac GTO
- 2004 Pontiac GTO
- 2005 Pontiac GTO
- 2006 Pontiac GTO
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
GMC Yukon
- 1999 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.
Race Use Only. This product is intended for competition use on vehicles that are never operated on public roads. It is not legal for sale or use on pollution-controlled motor vehicles, and it is not CARB exempt. Installing or using this part on a vehicle driven on public roads may violate the federal Clean Air Act and state emissions laws.
FAQ
What engines does the Texas Speed Chopacabra 6.0 camshaft fit?
This edition is made for stock 6.0L LS engines with cathedral-port cylinder heads, including the 317, 243 and 799 castings used on LQ4, LQ9, LS2 and LY6 based engines in GM trucks, SUVs and LS2 cars.
How is the 6.0L Chopacabra different from the regular Chopacabra truck cam?
The 6.0L edition runs 220/228 duration at .050" with .550" lift on a 108 LSA, compared with 214/222 on the 4.8L/5.3L Chopacabra. The added duration is matched to the larger displacement so the cam keeps its lope and midrange on a 6.0L.
What valve springs are required for the Chopacabra 6.0 cam?
Texas Speed requires LS6-style valve springs or better. The .550" lift is within the range of an LS6 beehive spring, so no high-lift dual spring package is needed.
Do I need a stall converter with this camshaft?
It is compatible with the stock torque converter, but Texas Speed recommends a 2,600 rpm or higher stall converter to get the most out of the cam's powerband.
Can I reuse my stock pushrods with the Chopacabra 6.0?
The cam is designed around stock-length pushrods, but Texas Speed advises measuring for proper lifter preload on the assembled engine before final installation.
Is tuning required after installing this camshaft?
Yes. A custom tune is required after a cam swap so the engine idles and runs correctly with the aggressive overlap of this grind.
