Our SLS performance package 2 features our proprietary ECU tuning software and long tube headers as found in package 1 with the addition of our sound and performance x-pipe exhaust. This combination unleashs the beast lurking underneath the refined exterior of your SLS. 

Our long tube headers are designed and manufactured in house and feature high quality, tri-metal, 200 cell sport catalytic cells which are ceramic coated to reduce heat in the engine compartment as well as combat against thermal stress. Our sound and performance x-pipe is constructed of high quality stainless steel with power proven x-pipe crossover design allowing for free flowing exhaust with less backpressure and greater performance.

R2 Package includes:

• RENNtech HHT ECU Upgrade - Hand Held Tuner
• RENNtech Long Tube Headers w/ 200 cell sport cats
• RENNtech Sound & Performance X-Pipe

SLS (C197) Stock Performance:

• 563 HP @ 6800 RPM; 479 LB-FT @ 4750 RPM

Modified Performance:

• 620 HP @ 6800 RPM; 522 LB-FT @ 5200 RPM