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The perfect, no compromise, daily driver upgrade
Strong torque gains throughout the entire RPM band
Lumpy idle with improved throttle response
Designed for stock stall converters and stock valve springs
See important fitting notes below
The perfect no compromise daily driver upgrade
Strong torque gains throughout the entire RPM band.
Lumpy idle with improved throttle response
Designed for stock stall converters and stock valve springs
Important Notes
A custom tune is required for the vehicle to run properly after installation.
For engines equipped with Active Fuel Management (AFM), a DOD Delete kit is mandatory. This applies to engines like the L76 and L77.
While designed for factory springs, we always recommend upgrading to a quality set of PAC or equivalent valve springs
| RPM Range | Part No. | Duration | with 1.7 Rocker | Lobe Sep Angle |
Lash
Measured Hot |
|||||
|---|---|---|---|---|---|---|---|---|---|---|
| Advertised | @.050” | |||||||||
| IN | EX | IN | EX | IN | EX | IN | EX | |||
| 871NSR1R | 273° | 304° | 219° | 249° | .510'' | .510'' | 110° | HYD | HYD | |
Important Notes
A custom tune is required for the vehicle to run properly after installation.
For engines equipped with Active Fuel Management (AFM), a DOD Delete kit is mandatory. This applies to engines like the L76 and L77.
While designed for factory springs, we always recommend upgrading to a quality set of PAC or equivalent valve springs