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Dinan's Free Flow Axle-Back Exhaust for the 540i provides power gains without the excessive noise associated with typical ''performance'' mufflers. The Dinan exhausts feature rigid and durable muffler cases manufactured from 20 gauge 304 stainless steel for optimum corrosion resistance. Internally, the systems feature Dinan's Tuned Resonance Chamber Technology providing the optimum balance between maximum power gains and a civilized, yet sporty exhaust note. The Dinan exhausts also provide substantial weight reduction compared to the stock mufflers. The mufflers weigh in at 18.5 lbs. compared to the stock systems at 34 lbs. Dual 3-inch diameter polished stainless steel exhaust tips give the cars a tasteful performance look as well.
Features
Specifications
| Body Material | T304 Stainless Steel |
| Category | Exhaust |
| Clamps Included | Yes |
| Dinan Point Value | 3 |
| Emission Code | 5 |
| Exhaust Tip Quantity | 4 |
| Finish | Brushed |
| Grade Type | Performance |
| Hangers Included | Yes |
| Height | 11 |
| Labor Time (Hours) | 1.5 |
| Length | 48 |
| Material | T304 Stainless Steel |
| Max HP Gain | 7 @ 6500 RPM |
| Max Torque (lb-ft) Gain | 6 @ 6500 RPM |
| Muffler Quantity | N/A |
| Pipe Material | T304 Stainless Steel |
| Product Type | Axle-Back Exhaust |
| Sub Category | Exhaust and Tail Pipes |
| Weight | 37.5 |
| Width | 30 |
| UPC | 813725021867 |
| Part Number | D660-3940 |
Note: Not compatible with vehicles equipped with the rear M-Technic bumper.
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.
Installation Instructions:
Free Canadian shipping on qualifying orders $399+, with no duties or brokerage. Special order and made-to-order items can't be cancelled or refunded once ordered. Oversized items may carry a handling fee depending on your location; pickup in Mississauga has no fee.
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We carry 750,000+ parts, so we can probably still get it. Check the spelling, try the part number, or ask us.
Request this part Text us (833) 691-5717