Dinan Free Flow Axle-Back Exhaust – BMW M6 (F1x)

OVERVIEW

Dinan's Free Flow Axle-Back exhaust for the F06 / F12 / F13 M6 is built entirely from stainless steel and measured to exact specifications so it mounts on the factory hangers and mounting points. Dinan dyno tuned the system for maximum exhaust flow with minimum backpressure, using its Helmholtz chamber and butterfly valve technologies to give a more aggressive sound under acceleration while reducing drone inside the car.

Exhaust gases exit through larger, laser engraved quad tips in ultra durable polished stainless or ceramic black. The system is designed and tested in Morgan Hill, California, carries Dinan's factory matching new car warranty, and can be purchased and installed at any Dinan Approved BMW dealership nationwide.

SPECS

• Power gain: +8 HP
• Construction: 100% 304 stainless steel
• Muffler design: "straight through" canister with Helmholtz chamber and butterfly valve technology to remove drone
• Tips: quad 3.5 in, laser engraved, black ceramic coated or polished stainless
• Mounting: uses the factory brackets and hangers for factory-like fitment
• Dinan published install time: 2.2 hours
• Emissions: 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 and is not covered by emissions regulations (Dinan emissions code 5). No CARB Executive Order number is published for this part.
• Warranty: Dinan covers the part for the remaining term of the vehicle manufacturer's new car limited warranty (typically 4 years / 50,000 miles) if the vehicle is still covered, otherwise 2 years / unlimited mileage from date of purchase. Maintenance and wear items, improper installation, racing use and competitive event damage are excluded.

PARTS INCLUDED

• 1 x Right muffler assembly (D663-0266)
• 1 x Left muffler assembly (D663-0267)
• 1 x Hardware kit (D663-0268) containing one 80 mm clamp, two M6 Nylok nuts, four M6 x 18 washers and two M6 x 20 bolts

TECH RESOURCES

Additional Parts Required

• None. Dinan specifies no additional hardware for this part — the mufflers mount to the factory hangers and mounting points and the required hardware is supplied in the kit.
• Installer-supplied tools: vehicle lift or jack stands, standard metric hand tools and penetrating oil for the factory exhaust hardware.

Installation

• Dinan D660-0049 / D660-0049-BLK Free Flow Exhaust installation instructions (PDF)
• Dinan notes that some mechanical skill is required to install this muffler and recommends a qualified BMW repair facility if you are not familiar with the procedure.

Notes

• Dinan's installation instructions cite a narrower 2013–2015 build range than its catalog listing for this part. Confirm fitment for your build date with Speed Logic before ordering.

PART NUMBER

• D660-0049-BLK — black ceramic coated tips (the finish stocked by Speed Logic)
• D660-0049 — polished stainless tips

VEHICLE APPLICATIONS