3\" Duel Stainless Supercharged Exhaust System, BMW 2008-2013, M3, E92 S65 for Sale


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Price: $1999.00


This exhaust was built to support 700-1000hp supercharged S65 engine. All the 2.5\" systems available, including expensive TI systems have tremendous back pressure at HP levels over 500whp. I\'ve measured countless. Most systems were 5-7psi (measured at header exit)  this causes egt\'s to be much higher than DME targets. Causing DME to add fuel, retard timing or pull throttle. 


I built many versions until back pressure was under 1psi @ 600whp and was still streetable. 


I found +30whp over 2.5\" \"race\" exhaust on SC engine.

All 304SS construction. All mandrel bends using max radiuses. All purge welded. 

Borla race mufflers as resonators (no drone)

4 Parallel rear mufflers

SS V-band connections 

VAC operated valves on each bank keeps cruis and idle sound under control. 


\"Cat appearing\" strait thru 3\" section can be swapped to catalyst type in future. 


X merge is moved as far forward as possible to improve torque. 


More than 15k in development to have your cake and eat it too! 


For more details or shipping info 262302.1025



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