Dinan 20-25 BMW X3 M/X4 M (F97/F98) Free Flow Axleback Exhaust System - Polished Tips - D660-0086

Perhaps equally important to the sound of the installed Dinan axle back system are the resulting aesthetics. With a nearly perfect symmetrical design, the raw muffler and pipe routing are pleasing to the eye even when the matching proportions are only partially visible after install. The piping culminates into four massive 114mm (4.5") tips that fill up the previously spacious factory cut out in the valance without appearing to be oversized and unnatural. The imposing tips utilize a new tip design with an inverted clamp neck. The new style allows for two very important things to happen. The first is the ability to have a longer tip sleeve length without sacrificing real estate for a clamp neck thus allowing larger tips even when there is limited straight pipe to clamp on to. Secondly, the interior clamp neck means that the clamp itself is almost completely hidden from view for an unblemished install. Dinan has retained its signature straight cut tip design, safeguarding its unique and elegant styling position amongst a crowded marketplace full of angle cuts. With systems available with either black ceramic coated or polished clamp-on, and laser engraved exhaust tips, there is a version that is sure to meet your individual aesthetic needs.

Features & Benefits

• Computer controlled exhaust valves retained, limiting noise during low speed driving and opening fully during high-load conditions.
• Twin exhaust valves are a whopping 76mm diameter, making them 30% less restrictive than the OE valves.
• Quad 4.5" (114mm) diameter clamp-on, double-walled, polished and laser engraved exhaust tips.
• Tuck-it tip design ensures a nearly flawless and unencumbered visual appearance.
• 100% 304 brushed stainless steel construction w/ TIG welding.
• Easy bolt-on installation with included mounting hardware.
• Larger diameter piping for increased flow (76mm vs 70mm).
• More Power: +8 HP @ 6600 RPM, +6 FT-LB @ 6600 RPM.
• 5 lbs lighter than the stock system.
• Enjoyably louder, sportier sound

Downloads & Resources

• Video File (WEBM)
• Installation Instructions (PDF)

Fitment has not been independently verified for your vehicle. Confirm the manufacturer application against your year, make, model, trim, and modifications before ordering.

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