The Dinan Free Flow axle-back is a single channel, straight through canister design in 100% 304 stainless steel that weighs 10 lbs less than the factory rear section and adds 6 hp and 5 lb-ft at 6,800 rpm. A Helmholtz chamber cancels the resonant frequency behind cruise drone, so the system stays civilized at light throttle and turns loud and sporty at wide open throttle. It exits through quad 3 inch black ceramic coated, laser engraved tips and hangs on the factory brackets and hangers for an OE style fit. Installation is roughly 1.6 hours.
| Type | Axle-back exhaust system (Dinan Free Flow), single channel straight through |
| Material | 100% 304 stainless steel |
| Tips | Quad 3 in, black ceramic coated and laser engraved |
| Weight Saving | 10 lbs lighter than stock |
| Power Gain | +6 hp and +5 lb-ft at 6,800 rpm |
| Drone Control | Helmholtz chamber |
| Mounting | Uses factory brackets and hangers |
| Installation Time | 1.6 hours |
| Quantity | 1 |
| Warranty | 4 year / 50,000 mile |
| Part Number | D660-0027 |
Documents: Installation Instructions (PDF) | Whitepaper (PDF)
This part fits:
| Year | Make | Model | Submodel |
|---|---|---|---|
| 2008-2013 | BMW | M3 | Base |
Shipping: In-stock orders placed before 3 PM EST ship the same day, and everything else ships within 24 hours. Standard, expedited, and overnight options are available at checkout. Backordered items ship as soon as we get them back in stock. Contact us for lead times. See the full Shipping Policy.
Returns: 30-day returns on new, unused items in original packaging. See the full Refund Policy.
