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B58 Racing
Dinan High Flow Mid-Pipe 3.25in Stainless - BMW 340i/440i (F30/F32), photo 1 of 1
DinanSKU: T14-DNND660-0057

Dinan High Flow Mid-Pipe 3.25in Stainless - BMW 340i/440i (F30/F32)

$607.95 Available

Ships from the brand or distributor, usually in 3–7 business days

Make sure this fits your car

Fits: BMW 340i (F30/F31), 440i (F32/F33/F36) (B58).

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  • Shipping at real carrier rates
  • 30-day returns on unused parts
  • Fitment help before you buy
Questions about fitment?Email a B58 tech with your VIN, and we'll confirm before you order.

The mid-pipe is the long center section of the exhaust between the catalytic converters and the rear mufflers. Dinan's high-flow version for the F30 340i and F32 440i swaps the factory section for a larger 3.25 in stainless pipe, giving the exhaust a freer path.

What you get

  • 3.25 in diameter piping, larger than stock, for less restriction.
  • Stainless steel construction.
  • Replaces the factory mid-section between the downpipe and the rear section.

Good to know

  • Dinan only confirms fitment with its own Free Flow axle-back or the factory rear exhaust. Other axle-backs are not guaranteed to fit.

Brand: Dinan · Part #: D660-0057

Ships from the brand or distributor, usually in 3-7 business days.

Guides for this part

Best B58 Mods, In the Order to Do Them

Start with a tune. It is the biggest gain per dollar on any B58. Then add a downpipe and a Stage 2 map, then an upgraded high-pressure fuel pump (HPFP) and an ethanol blend. Only after that should you think about a bigge

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