This article is from Supersprint Official Research & Development Blog - Supersprint Labs where we take you inside Supersprint's R&D effort on various cars, explaning in full details the processes involved in crafting our world renowned exhaust systems.

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Supersprint offers the widest range of Mercedes-Benz AMG high performance exhaust systems on the market. Throughout the years, we have amassed vast experience with Mercedes’ massive naturally aspirated and supercharged V8s.

Recently, Mercedes-Benz AMG completely changed their engine development philosophy to meet ever increasing fuel consumption requirements by reducing displacement and going to twin turbocharged V8s for their CLS and E Class AMG offerings. We researched and developed numerous variations to come up with the final, ultimate performance exhaust systems for the 5.5 Biturbo engine on the E and CLS platform.

Stock Exhaust

The CLS63 and E63 5.5TT share the chassis and under-body, as such the exhaust system and power-train are exactly the same except for the tailpipes. The stock system is divided in two parts:


Downpipe Development

At Supersprint, we constantly begin research and development starting from the engine. Usually, this is where most performance gains are achieved and the remainder of the system is developed with this in mind. We replaced the OEM downpipes with simple direct pipes, and we placed 200 CPSI HJS metallic cats on the front pipes where the stock system has two resonators. The downpipes must be fitted with our catted or catless front pipes.

We kept the primary O2 sensor bungs on the downpipe to allow connection with the OEM 02 sensors without wire extensions to avoid any trouble with the air/fuel management. For the secondary post-cat sensors, we prepared two possible positions:







Cat-Back Exhaust Development

The cat-back can be fitted with the OEM front section thanks to specific adaptors (847433), after some dyno and sound test we decided an H-Pipe was the best solution (part number 848313). The rear mufflers end up being the only silencers present on the car with the full Supersprint system. The mufflers structure was researched, developed and designed for this car with the target of a muscular, V8-rumble in mind.

For the tips, we went for the classic 120x80mm oval quadruplets. They are adjustable to reach the perfect position in the bumper arch. The tips are slightly different in length between the CLS, the Saloon and the Wagon.

It’s possible to fit the OEM rear muffler and tailpipes with the Supersprint H-pipe and front section, to get more sound without changing the look of the car, or to fit the Supersprint rear exhaust with the stock centre and front sections as well, for a mild sound increase with a different, deeper tone.








Power Gains & Upcoming Exhaust Intermediate Pipe R&D

Power gains with the full system are minimal without a ECU tune as the engine doesn’t allow any increment in turbo boost pressure even with the new reduced backpressure from the Supersprint exhaust.

A potential cause for this is another section of pipe, right under the headers (refer to the AMG turbo diagram). The exhaust intermediate pipe (pink section) has an extremely irregular shape, flattened and very restrictive. These are also quite hard to replace, so at first we worked just on the “visibile” part of the exhaust.

We were able to fit a new “twin branches” design pipe, longer and with a much larger section without changing or removing any other component in the engine bay. It wasn’t possible to use a sigle, larger bore pipe since the room available is small and irregular.

These new pipes are still under development as in order to fit these new pipes, the downpipes will need to be revised as the new intermediate exhaust pipes are longer to avoid steep angles in the merged section of the two branches. This section is also much larger than stock. We also fitted support brackets on the pipes to avoid excessive stress to the turbo flanges. We are also considering using Inconel as they are subject to extreme temperatures and mechanical stress.

AMG OEM Turbo Diagram

 

We currently offer special prices for all MBworld members. Call us at 877-691-2825.

 

Can you quantify the hp/tq gains? Estimes would do with and without a tune.

I'm also assuming they would fit on the 2014 4 matic model with no problems? (Welding, cutting, etc.)

 

When tested with our full system without a tune, gains were very low, nothing noticeable. A customer in Germany told us around 680hp, with a tune, but we have no proof of that as he never sent the charts.

As for the 2014 4matic compatibility, there are some differences so we're not sure if it will fit, until Supersprint has the chance to run some tests.

 

We are currently running sales on all CLS63/E63 5.5 parts. PM us or give us a call at 877-691-2825

 

PM us or give us a call for information on prices, stock availability and any other questions on the featured system.

 

Any news on your upcoming Exhaust Intermediate Pipe?

 

Unfortunately, we don't have any updates at the moment! We will keep the community informed as soon as possible.

 

Special prices on all orders and pre-orders until March 1st. PM us or call us at 877-691-2825.

 

Do you make one for the W212 E550 V8?

 

Yes we do! PM us for pricing information.