Industry News
Supersprint North America Announces Turbo-back Exhaust for 335i
By Press Release- Supersprint North America
Mar 29, 2007, 13:41

Supersprint, Italy’s premier exhaust tuning manufacturer, has developed a new stainless steel full exhaust system, from the turbo back, which includes a set of special 65mm down pipes, a set of metallic cats with 100cpsi, a mid section wit a built-in X-pipe, and a set of rear mufflers with bolt-on tip kits, available in quad or dual design.

The increase in performance is astounding, as the peak power jumps from a tested 324 Hp to 348 Hp! But most importantly, the torque curve is way above the stocker, from 1500 rpm all the way to redline. In some places the difference is greater than 26 Hp (5000 rpm).

The power build-up remains as smooth as stock, only much stronger throughout the range.The stock engine puts out 324 Hp instead of 306 Hp. These are impressive numbers to start with, and consistent with rumors rampant among the German tuners about this new BMW turbo engine. Some of them are aware that the factory tuned it to a higher degree, compared to what the brochures claim, but few of them actually expected that the full Supersprint exhaust system would instantly make the 335i faster and quicker than BMW's own E46 M3!

Driving the 335i with the Supersprint exhaust is a new experience, as the sound may seem soft when compared to the excellent high-revving M3. However, stealth sometimes is compatible with immediate throttle response and quick acceleration. Supersprint achieved this result without using the popular exhaust flapper valve gimmick, found on the stock system, as well as on several other aftermarket exhausts. By using its tried-and-true method of studying the engine flow characteristics, and determining the best pipe diameter, the perfect tube layout and the ideal silencer canisters' design and volume, Supersprint has again done an excellent job, building a state-of-the-art exhaust system, perfectly suited for everyday use, which offers unmatched, race car performance.



Turbo down pipes
The stock down pipes cause a major restriction in the exhaust flow, partly because of the limited room available in the engine
bay, as the crushed tubes design and the built-in cats, located next to the turbos' outlet ports, cause the exhaust gas backpressure to rise to less-than-ideal levels, at all rpm and engine loads. This design retains a lot of heat in the engine, and it's no surprise that the Lambda (Air/fuel ratio) breaks the low 0.7 barrier. This is probably necessary for the engine's own durability, however it definitely affects performance in a negative way.

On the contrary, the design of the Supersprint down pipes takes advantage of even the smallest space available, and frees the exhaust gas flow dramatically. The Supersprint pipe cross section remains constant all along the down pipes, and the pre-cats are totally eliminated.

Metallic cats
After the down pipes' outlet flanges, the cross section shrinks down to 60mm, and it is maintained constant all the way to the tail tips.In place of the stock, quad cat design, Supersprint uses two high-volume, high-flow, HJS metallic catalysts, placed further away from the engine, for the lowest restriction and the best results.This design has been borrowed from the popular SS E46 M3 exhaust system.

Mid-"X" pipe section
The stock Mid pipe has an unbelievable number of crushed sections, for added clearance. The result is that the flow rate is negatively influenced by the crooked design and the shrunk-down cross section of the tubes. Supersprint made its mid pipes with a real "X" section for balancing the exhaust flow, and most important, without having a single crush. The needed clearance is guaranteed, nonetheless. Again, a major improvement over the stock exhaust.

Rear Mufflers
The Supersprint rear mufflers are of the performance proven "flow through resonated design", rather than the baffled chamber design used by other manufactures. The internal tubing diameter is optimizes performance while the long strand rock wool sound deadening material provides the mature tone that Supersprint is so well know for.The stock, one-piece muffler system has a totally unnecessary, complex design, which includes a built in flapper valve, on one side of the system only, which has the sole purpose to alter the sound note at a certain, pre-set rpm. Not a performance related feature by any mean, as the Supersprint rear mufflers alone do increase the torque and max Hp by a significant amount, especially at low rpm.Regardless, the Supersprint system has absolutely no droning, even at low rpm and high loads.

Tail tips
By using a bolt-on tip design, you have a choice of either the more conservative single 100mm round tip, which is a direct fit under the bumper valance, or the more radical dual 80mm quad tips , which requires trimming the bumper lower valance to accommodate the twin 80mm chrome tips.


For more information, contact:

Supersprint North America
3208 Park Center Drive
Tyler, TX 75701
www.supersprintna.com
800.239.7232






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