R1 Performance Package for SLS Black Series (197- 675 HP / 500 LB-FT) porsche-boxster--981---2012-2016--boxster-gts-esr7596289 RENNtech ECU Upgrade for 221

RENNtech ECU Upgrade for 221 - S 65 AMG

Exhaust: +21 HP / +22 LB-FT

RENNtech Fuel System Upgrade

The CPC upgrade is included with Turbo upgrades and recommended with ECU tunes

Akrapovic Slip-On Line (SS) Audi S5 Coupé/Cabriolet (8T) 2011

R1 Performance Package for SLS Black Series (197- 675 HP / 500 LB-FT) porsche-boxster--981---2012-2016--boxster-gts-esr7596289 RENNtech ECU Upgrade for 221R1 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