MagnaFlow SPEQ Series cat-back exhaust for the 3.0L B58 inline six, built from mandrel-bent 3 in 304 stainless steel tubing with a 3.5 in front pipe and a stamped Y-pipe that merges exhaust pulses. Dual 5x8 in straight-through mufflers and an NDT resonator give a deep, aggressive tone under acceleration while eliminating drone at cruise. Quad 3.5 in black chrome tips with laser-etched MF logos mount on V-band clamps, or the factory tips can be reused, and cast stainless valves retain OEM valve function in every drive mode. It replaces the factory components behind the catalytic converters and includes band clamps, logo brackets and all installation hardware.
Specifications
| Type | Cat-back exhaust system (SPEQ Series) |
| Engine | BMW B58 3.0L inline six |
| Material | 304 stainless steel |
| Tubing | 3 in mandrel-bent, 3.5 in front pipe, stamped Y-pipe |
| Mufflers | Dual 5x8 in straight-through with NDT resonator |
| Tips | Quad 3.5 in black chrome, V-band mounted (factory tips reusable) |
| Valves | Cast stainless, retains OEM valve function |
| Includes | Band clamps, laser-cut logo brackets, installation hardware |
| Part Number | 19828 |
| Warranty | Limited lifetime construction warranty |
This part fits:
| Year | Make | Model | Submodel |
|---|---|---|---|
| 2020-2024 | BMW | M340i | Base |
| 2020-2024 | BMW | M340i xDrive | Base |
| 2021-2024 | BMW | M440i | Base |
| 2021-2024 | BMW | M440i xDrive | Base |
Shipping
- Orders placed before 3 PM EST 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
