RENNtech SLR Performance Exhaust Package (Header+Muffler) with 200 Cell Sport Cats range-rover--322-lm---2009-2012--5-0l-supercharged-v8--aj133--esr9160116 RENNtech performance software unleashes your

RENNtech performance software unleashes your McLarens" true potential

ECU+ Upgrade | Up to 644 HP / 676 LB-FT | Gains: +102 HP & +94LB-FT

and greater stability at high speeds

RENNtech’s engineers were able to significantly increase the area under the curve

RENNtech SLR Performance Exhaust Package (Header+Muffler) with 200 Cell Sport Cats range-rover--322-lm---2009-2012--5-0l-supercharged-v8--aj133--esr9160116 RENNtech performance software unleashes yourThe SLR Mclaren Performance Exhaust consists of RENNtech Stainless Steel Headers and RENNtech Stainless Steel Sport Mufflers with 200 cell Catalytic Conveters. Total Gains: +59HP & +33TQ. Improve SLR performance output up to 59HP with the RENNtech Exhaust upgrade consisting of SLR Header and SLR Race Muffler! These RENNTECH SLR headers are developed and tested completely in house and improve the SLR perfromance ouput up to 44HP! These headers are hand