Dinan Free Flow Axle-Back Exhaust – BMW 535i (F10)

OVERVIEW

Dinan engineered this Free Flow Axle-Back Exhaust for the F10 BMW 535i to improve exhaust flow and reduce back pressure, which raises power output and gives the car a sportier voice — civilized when you want it to be, and pleasantly aggressive under hard acceleration. A Helmholtz chamber is built into the design to cancel the resonance or “drone” that free-flowing exhausts usually bring at low RPM.

The system is built to exacting specifications so it hangs on the factory brackets and hangers for a factory-like fit. It is fabricated entirely from 16 gauge 304 stainless steel and will resist corrosion for years. Twin 89mm laser-engraved tips, available polished or in ceramic black, finish the installation with a tasteful, high-performance look. The factory computer-controlled exhaust valve is eliminated as part of the install.

SPECS

• Power gain: +6 HP @ 6600 RPM
• Torque gain: +5 LB-FT @ 6600 RPM
• Construction: 100% 16 gauge 304 stainless steel
• Tips: twin 89mm (3.5") laser engraved, per side
• Tip finish options: polished stainless or ceramic black
• Helmholtz chamber design to reduce low-RPM drone
• Mounts to the factory exhaust brackets and hangers
• Factory computer-controlled exhaust valve is eliminated
• Dinan published installation time: 1.4 hours
• Emissions status: Dinan states this part is legal for sale or use on Emissions Controlled Vehicles, Uncontrolled (Non-Emissions Controlled) Vehicles, and Racing Use Only Vehicles because it does not affect vehicle emissions
• Warranty: if the vehicle is still covered by the BMW new-car warranty, Dinan covers the part for the remainder of that warranty up to 4 years / 50,000 miles; otherwise 2 years, unlimited mileage. Wear items are excluded.

PARTS INCLUDED

• Two Dinan free-flow axle-back mufflers with integrated twin 89mm tips
• Exhaust clamp hardware kit
• Factory rubber hangers and the stock muffler weight are transferred from the original mufflers during installation; see the installation instructions for the full bill of materials.

TECH RESOURCES

Additional Parts Required

• None. Dinan specifies no additional hardware for this part — the required exhaust clamps are supplied in the kit.
• Installer-supplied: standard hand tools and a vehicle lift or jack stands.

Installation

• Dinan D660-0051 / D660-0051-BLK Free Flow Axle-Back Exhaust — Installation Instructions (PDF)

Notes

• Fitment per Dinan's installation instructions for D660-0051. If you are unsure which tip finish or application matches your car, confirm with Speed Logic before ordering.

PART NUMBER

• D660-0051 — polished tips
• D660-0051-BLK — ceramic black tips

VEHICLE APPLICATIONS