Sound isn't the only aspect of the exhaust that has been modified. The Dinan F90 M5 exhaust has been skillfully crafted entirely out of T304 stainless steel and TIG welded for the best visual appearance and color. The entire system is then brush finished to further guarantee an immaculate looking system out of the box. The attention to detail is not limited to parts of the system you can't see once the exhaust is installed but is also extended to the exhaust tips themselves. The Dinan exhaust sports enormous, quad 4" (102mm) clamp-on, double-walled, black ceramic coated and laser engraved exhaust tips. Dinan has retained its signature straight-cut tip design, safeguarding its unique and elegant styling position amongst a crowded marketplace full of angle cuts. The tips masterfully fill up and accentuate upon the factory cut-outs showcasing an extremely aggressive, yet refined, styling that will turn heads even before it is heard.

Features

More Power: + 6 HP @ 6600 RPM, + 5 LB-FT @ 6600 RPM

Enjoyably louder, sportier sound

Four massive 4" diameter clamp-on, double-walled, black ceramic coated and laser engraved exhaust tips

100% 304 stainless steel construction

Larger diameter piping for increased flow (83mm vs 80mm)

Stock exhaust valve actuators reused and operation of exhaust valve is unchanged so exhaust tone can be adjusted via the M-drive settings

Computer controlled exhaust valves are retained and limit noise during low speed driving and open fully during high-load conditions 

Twin secondary exhaust valves are a whopping 76mm diameter, making them 30% less restrictive than the OE valves

Easy bolt-on installation with included mounting hardware