Dinan Valved Cat-Back Exhaust - BMW X3 M40i / X4 M40i

OVERVIEW

A full cat-back exhaust for the X3 M40i / X4 M40i (B58) that requires no cutting and uses factory mounting locations for a straightforward install. Fabricated from brushed T304 stainless steel, TIG welded and free of hydroformed pipe, with an M-inspired quad tip layout replacing the OEM dual slip tips.

SPECS

• Four individually functioning tips/pathways — no Y-tips or gimmicks
• Full cat-back construction for maximum sound and flow improvement
• Retains factory valve control for streetable civility
• 100% T304 stainless steel, TIG welded, brushed finish, free of hydroformed pipe

PARTS INCLUDED

• 1x valved cat-back exhaust (Polished or Black Ceramic Coated tips per variant)

TECH RESOURCES

• Installation Instructions (PDF)
• Bolt-on install using factory mounting points — no cutting required

PART NUMBER

• Polished — D660-0099
• Black Ceramic Coated — D660-0099-BLK

VEHICLE APPLICATIONS