Supersprint has a full exhaust available for the 2018 BMW 440i and the 440i xDrive, which has been designed to enhance the peak hp and the torque, opposite to the restrictive nature of the stock, oem system.
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It has been developed and tested in 2015, and sized to guarantee the best flow rate of the spent exhaust gases, with ECU tune reprogramming up to 400+Hp, helping the B58 engine getting as close as possible to its full potential.
The downpipes are available in three distinct versions; with HJS Motorposrt, high volume 100 cpsi cat, with HJS 200 cpsi cat, and in a race, cat-delete option (for closed course, racetrack use only).
The SS downpipes relieve the thermal load off the turbocharger, by a huge amount, making the gains more consistent, too.
The front and mid pipes, also available in a resonated version, use 80mm stainless tubing, mandrel bent, without the crushed sections of the stock exhaust's compromised design.
This complements the SS Downpipe's ideal flowing characteristics.
The Supersprint dual-sound mode rear muffler has a direct, straight-thru path when the flap is open, giving a wild, totally untamed exhaust note, and a longer, inner resonated path, for a droning-free operation in the low rpm range.
As in our 60 year tradition, this exhaust and all of its individual components are built in house, here at the Supersprint Factory in Italy.
We even machine and build the flaps at our own shop.
The rear muffler is available in a dual-tip version, for the std. 440i Factory bumper (great looking, with slightly larger than stock dimensions, silver chrome or black coated), and in a quad-tip design, for the conversion to the BMW M4 style diffuser.
For the the budget-limited projects, we offer an additional D/P + mid exhaust option, which retains the BMW Factory M-Performance rear muffler.