R1 Performance Package for SLS Black Series (197- 675 HP / 500 LB-FT) porsche-boxster--981---2012-2016--boxster-gts-esr7596289 575 awhp @ 5

575 awhp @ 5

RENNtech Fuel System Upgrade

Gains: +59HP & +43 LB-FT

Gains: +23HP & +20LB-FT

with RENNtech Motorsports logo on two sides

R1 Performance Package for SLS Black Series (197- 675 HP / 500 LB-FT) porsche-boxster--981---2012-2016--boxster-gts-esr7596289 575 awhp @ 5R1 Performance Package for 197 SLS AMG Black Series. Includes ECU Upgrade and Long Tube Header. Up to 675HP and 500LB FT. Gains: +44HP & +32LB FT Our SLS Black Series performance package 1 features our proprietary ECU tuning software combined with our long tube headers unbelivable sound with performace to match. Our long tube headers are designed and manufactured in house and feature high quality, tri metal, 200 cell sport catalytic cells which are