• Milltek Large Bore Downpipe with Hi-Flow Sports Cat | BMW E90/E92/E93 M3

Milltek Large Bore Downpipe with Hi-Flow Sports Cat | BMW E90/E92/E93 M3

$3,048.43
$3,048.43
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The Milltek Large Bore Downpipe with Hi-Flow Sports Catalyst is engineered for BMW E90/E92 M3 models and designed to pair with the Milltek Cat-Back Exhaust System. OEM catalysts restrict gas flow significantly; this hi-flow sports cat reduces that restriction, improving exhaust scavenging and supporting measurable power gains when combined with a Stage 2 ECU remap.

Precision mandrel-bent T304L stainless steel construction ensures durability and consistent flow characteristics. The large bore diameter maximizes exhaust velocity. Direct factory fitment uses OEM hangers and mounting points—no modification required. Lambda wiring extension is required for installation.

Fitment & Requirements:

  • Direct fit: BMW E90/E92 M3 (S65 engine)
  • Requires Stage 2 ECU remap for optimal performance
  • Designed for use with Milltek Cat-Back Exhaust System only
  • Lambda sensor wiring extension required

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

Milltek Large Bore Downpipe with Hi-Flow Sports Cat | BMW E90/E92/E93 M3

$3,048.43

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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.