MERCEDES R171 SLK 350 V6 (M272 - 272 Hp) '04 -> '07

Rear Mufflers

An extensive development and testing process has led to this new set of R & L Supersprint rear mufflers, which implement the Free-Flow design typical of all of the Supersprint performance systems. Contrary to the stock muffler system, which uses the baffled, resonated chamber design, this exclusive design not only gives the Supersprint exhaust the right sound but also ensures an effective reduction in backpressure. The Supersprint silencer's tapered cross-section, its overall volume, and the inner-perforated core pipe diameter all work together to best suit this new Mercedes engine and ensure optimum results. Supersprint used its exclusive oval & tapered cross-section silencer design. This design has been developed specifically for all Mercedes models equipped with an R & L exhaust, like the SL R230, the E W211, and the CLS. This particular, streamlined design uses the available space for the exhaust system at its best, and keeps the silencer boxes tucked in and away from the direct air flow running under the car chassis. This feature ensures the least wind resistance. The exclusive Supersprint muffler design also provides the right blend of exciting sound and optimum performance. The Supersprint mufflers are available in the oval, 120x80mm tip design (1 tip each side, for the stock rear bumper), or in the 120x80mm quad-oval design, for the AMG-Style bumpeRight

Metallic catalytic converters, with 100cpsi beds

The front section of the Supersprint exhaust uses 2 Metallic catalytic converters with 100cpsi rating, one cat on each side. The stock system, on the contrary, uses a total of 6 cats (3 cats each side), 4 of them (2 each side) are positioned very close to the cylinder heads, and their rating is 400cpsi and over. This design severely restricts the exhaust gas flow and the performance. The Supersprint HJS cats are made in Germany by Emitec, the world leader in technology for performance, Metallic catalytic converters, are positioned further downstream in the exhaust system and have the much lower cpsi rating of 100 cells per square inch. These features guarantee a dramatic reduction of the exhaust gas backpressure and also allow for lower engine temperature in the head exhaust ports' area when under a load, especially at medium and high rpm.
Developed with the 24 hour race series in mind, this Supersprint exhaust component uses before - and -after-cat Lambda sensor ports, and is 100% compatible with the car's own OBD II emission management system.
It is also available in a non-cat version, for use on closed-course, wherever the race sanctioning body regulations allow it.

END RESULT

The final result of the full Supersprint exhaust system is a substantial increase in performance and torque, from the lower rpm range, all the way to the rev limit. Each one of the individual components of the Supersprint exhaust has been designed and tested with the specific goal of maximizing performance but the optimum results can only be achieved by using all of components together.
At 6250 rpm the increase in performance is +10.5 Hp. Starting from 2100rpm the torque curve of the Supersprint system is continuously above the stock curve. In fact, within the 4200 to 6200 rpm range the average gain in engine torque is + 10Nm.
Last, but not least, the lighter overall weight of the Supersprint exhaust system further enhances the handling characteristics of the SLK 350.