Stainless Steel Headers for M156 - 63 AMG Engines mercedes-benz-e-class-wagon--212---2010-2013--e63-amg--2010-2011--esr5958650 R3 Performance Package for Mercedes-AMG

R3 Performance Package for Mercedes-AMG GLS 63: ECU Upgrade (HHT)

9 Mercedes Seven Speed Transmissions

the 117 - CLA 45 AMG

Modified Axle Spline Count= 33 splines

Rated by RENNtech:               435 HP @ 5

Stainless Steel Headers for M156 - 63 AMG Engines mercedes-benz-e-class-wagon--212---2010-2013--e63-amg--2010-2011--esr5958650 R3 Performance Package for Mercedes-AMGRENNtech Stainless Steeel Exhaust Headers for M156 63 AMG Engines. Gaines: +11HP & 20TQ RENNTECH stainless steel and ceramic coated exhaust headers offer true bolt on installation, mounting directly to the OE down pipes and all RENNTECH headers are hand built from mandrel bent, seamless tubing and CNC machined stainless flanges. Advanced computer aided design (CAD) and flow analysis software allows RENNTECH headers to deliver substantial gains across