About This Product
Custom tuning requires a mechanically sound vehicle and the correct flashing device. Full tuning terms, responsibility agreement, and upload instructions are completed securely inside the JR Jones Racing Tune Portal after purchase.
Texas Speed Camshafts
Chopacabra Truck Camshaft
The Texas Speed & Performance Chopacabra camshaft is one of the most popular LS truck cams available, known for its aggressive lopey idle, strong mid-range torque, and excellent top-end power gains. Designed for 4.8L, 5.3L, and 6.0L LS engines, this cam delivers the signature "chop" sound while maintaining solid drivability when properly tuned.
Signature Chop Sound Known for the aggressive idle lope that gives LS truck builds the unmistakable Chopacabra sound and attitude.
Street And Strip Power Delivers strong mid-range torque and top-end horsepower gains, making it a top choice for truck performance builds.
Camshaft Specifications
- Duration @ .050": 214° / 222° intake / exhaust
- Lift: .550" / .550"
- LSA: 108
- 3-bolt camshaft design
Quantity Included
- 1 camshaft
Engine Compatibility
- Designed for Gen III and Gen IV LS truck engines
- 4.8L LR4, LM4
- 5.3L LM7, L59, LH6, LC9, LMG
- 6.0L LQ4, LQ9, LY6, L96
Performance Characteristics
- Aggressive lopey idle chop sound
- Strong mid-range torque gains
- Improved top-end horsepower
- Excellent street / strip balance
Vehicle Fitment
- Chevrolet Silverado 1500 / 2500 / 3500
- Chevrolet Tahoe / Suburban
- Chevrolet Avalanche
- Chevrolet Express Vans
- GMC Sierra 1500 / 2500 / 3500
- GMC Yukon / Yukon XL
- GMC Savana Vans
Required Supporting Mods
- Upgraded valve springs REQUIRED
- Pushrods recommended
- DOD / AFM delete required if equipped
- Custom tuning REQUIRED
Important Fitment Notes
This camshaft is more aggressive than the NSR version and requires the correct supporting parts for safe and reliable operation.
- 3-bolt camshaft only
- Not compatible with VVT without conversion
- Designed for cathedral port truck engines
- More aggressive than NSR version and requires supporting mods
Not intended for stock, emissions-controlled daily drivers in all regions.
Installation Information ›
- Professional installation recommended
- Valve spring upgrade is mandatory for safe operation
- Verify lifter condition during installation
- Degreeing camshaft recommended for optimal performance
Note:
This camshaft requires upgraded valve springs and proper tuning. It is a top choice for LS truck owners wanting the signature Chopacabra sound and strong real-world power gains.
