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Berk 135i / 335i 4" Catless Downpipe (BT1855)

Berk Technology's catless downpipe for 135i and 335i N55 single turbo models features ultra low backpressure 4" piping for quick spool.
Was: $599.99
Sale: $533.99
Save: 11%
Save: $66.00

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For N55 single turbo models.


  • Ultra low backpressure 4" downpipe
  • 23HP gain over stock at the same boost level with no tuning devices
  • 30TQ gain over stock at the same boost level with no tuning devices
  • Straight shot design for zero restriction and high velocity
  • Largest possible tubing for quicker spool
  • Zero taper on flange at turbo for largest possible pressure differential
  • Largest downpipe on the market, uses more 4" tube than the competition
  • Reinforced brackets for proper support on the turbo and manifold assembly
  • 100% Made in the USA
  • Optional: Ceramic coatings normally used for race pistons for much greater thermal barrier protection compared to exhaust coatings

What's in the box

  • Qty 1- Berk Technology 4" stainless steel downpipe
  • Qty 2 - Berk Technology Gaskets
  • Qty 8 - Nordlock Vibration Proof Locking Washers
  • Qty 4 - Mounting Bolts
  • Qty 4 - Flange Nuts


Shipping Information

  • Item Requires Shipping
  • 7.0 lbs.
  • W20.0000” x H8.0000” x L8.0000”
  • Free FedEx Shipping!
  • This item ships in its own box.

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