Bilstein B4 OE DampTronic Strut (Rear) - Mercedes / SL63AMG / SL400 / SL45017-20 SL550Bilstein B4 OE Replacement (DampTronic) dampers are direct OE replacements for the electronically adjustable dampers found on many European brand vehicles. Bilstein B4 OE Replacement (DampTronic) dampers are specifically engineered to be the best choice for maintaining the original ride quality of your vehicle, while meeting or exceeding OE standards. Bilstein B4 OE Replacement (DampTronic) dampers are the ideal choice for the driver looking to

which replaces only the rear mufflers of the stock M6 exhaust

the RKP’s high mount will elevate your rear wing to new heights

An Injection pump that doubles as a vacuum pump located in engine bay

The software is designed to operate with premium gasoline that has an average octane rating with full emissions to create clean burning combustion with good AFR all within factory specifications

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The full kit also includes our BOV adapter providing an extra 1/8" NPT vacuum port source

This difference in pressure on one side helps to push the piston inside the brake master cylinder forward in response to the brake pedal

Aero-Grade Titanium

a completely rebuild-able head and 2-year warranty

2006-2007 Audi A3 2

shortened life of bushings and tensioner spring

Matches OE spring rate for proper pedal tension