This kit deletes the factory resonated section under the car, between the catalyst and the rear muffler, and replaces it with straight through 3.25 in. (82.6mm) mandrel-bent tubing. That is a step up from the stock hydro-formed 80mm piping, so flow improves and the stock system picks up an aggressive tone that turns into a growl when a Dinan axle-back is fitted behind it. Construction is 100% 304 stainless steel and mounting hardware is included for a bolt-on installation. Dinan confirms fitment behind the stock exhaust and its own Free Flow axle-back; other axle-back units are not guaranteed to line up.
Specifications
| Type | Resonator delete pipe kit |
| Position | Mid-pipe, between the catalyst and the rear muffler |
| Diameter | 3.25 in. (82.6mm) |
| Material | 100% 304 stainless steel, mandrel bent |
| Hardware Included | Mounting hardware |
| Warranty | Remainder of the vehicle manufacturer's new car limited warranty (up to 4 years/50,000 miles), or 2 years/unlimited miles from date of purchase, whichever is greater |
| Part Number | D660-0058 |
Documents: Installation Instructions (PDF)
This part fits:
| Year | Make | Model | Submodel |
|---|---|---|---|
| 2014-2016 | BMW | M235i | Base |
| 2015-2016 | BMW | M235i xDrive | Base |
Shipping
- Orders placed before 3 PM ET typically ship the same business day. Larger items ship within 1 to 3 business days.
- Standard, expedited, and overnight options at checkout.
- Oversized items ship by freight and take longer.
- Special order items follow a lead time we confirm with you individually before the order is committed.
- Backordered items ship as soon as stock lands. Lead times are manufacturer estimates and can change. Contact us for current ETAs.
- Need to cancel? Email us right away. Cancellations are not guaranteed once an order is in process. In-stock orders cancel free before they ship; a 6% fee applies only to confirmed backorders and special orders.
- International orders: prices do not include VAT, duties, or import fees. Your country charges these at import and they are the buyer’s responsibility.
Returns
- 30 days from delivery to request and ship back a return on new, uninstalled items in original packaging with all hardware.
- Standard returns: 8% restocking fee on the item price before tax and shipping. Shipping is not refunded in either direction. All waived if the item is defective or we made the error.
- Fitment guaranteed: select your vehicle above, or confirm fitment with us in writing before you order. If the part shows as a fit and it is wrong, the return is on us, even after installation. Otherwise, installed or used parts cannot be returned.
- Final sale: special orders, coilovers, electronics, engine internals, turbochargers, superchargers and turbo kits, unless defective or we sent the wrong item.
- Product images may be representative. The SKU and specifications in the listing are what ships.
- Email us for return authorization before shipping anything back.
Full details: Shipping Policy · Returns & Refunds · Warranty
