• Milltek Large-Bore Downpipe | BMW F80 M3 / F82 M4

Milltek Large-Bore Downpipe | BMW F80 M3 / F82 M4

$893.45
$893.45
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Milltek Resonated Cat Back Large-Bore Downpipe for BMW F80 M3 and F82 M4 (S55 engine). This resonated secondary catalyst delete is engineered for direct fitment to Milltek cat-back exhaust systems, combining increased flow capacity with refined sound character. The larger bore diameter reduces backpressure and improves scavenging efficiency compared to OEM units.

Fabricated from T304L stainless steel with mandrel-bent construction, this downpipe features a high-flow catalyst bypass design. Installation requires Stage 2 ECU remap for optimal tuning. Uses OEM hangers and mounting points—no modification required. Compatible with all Milltek cat-back systems for this platform.

  • T304L stainless steel construction
  • Mandrel-bent, seamless bore
  • Resonated design for refined exhaust note
  • Secondary catalyst delete configuration
  • Direct OEM+ fitment to Milltek cat-back exhausts
  • Requires Stage 2 ECU remap
  • S55 engine compatible

Milltek downpipes are developed and tested to deliver measurable power gains without compromising drivability or longevity.

Fits Milltek Cat-Back.

Designed and manufactured in the UK with 40+ years of performance exhaust heritage. Tested at the Nurburgring.

Milltek Large-Bore Downpipe | BMW F80 M3 / F82 M4

$893.45

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Can I return a part after it has been installed?

Generally, installed or used performance parts cannot be returned. We strongly recommend verifying vehicle fitment and inspecting the product before installation.

Can I cancel my order after it has been placed?

We begin processing orders as quickly as possible. If you need to cancel, contact us immediately. Once an order has entered fulfillment, been submitted to a supplier, or shipped, cancellation may no longer be possible.

Will this part fit my vehicle?

Fitment varies by year, make, model, trim, engine, and drivetrain. Use our vehicle fitment information to confirm compatibility. If you're unsure, contact us with your VIN and we'll help verify fitment before you order.

How do I know if this is the right upgrade for my build?

Not every upgrade makes sense for every vehicle or build. Tell us your vehicle, current modifications, and performance goals, and we'll help determine whether this product is a good fit.

Are the products you sell authentic?

Yes. We source products through established manufacturers and authorized distribution channels. We do not sell counterfeit or imitation performance parts.

Is professional installation recommended?

For most performance components, yes. Proper installation is critical for fitment, reliability, and performance. Some products may also require specialized tools, programming, tuning, or additional supporting modifications.