Milltek Hi-Flow Sports Cat & Downpipe for BMW 3 Series E90 M3 4.0 V8 Saloon/Sedan (2007-2011) – Improved Flow, Sports Catalyst
This is Milltek's large-bore downpipe with hi-flow sports cat for the BMW 3 Series E92 M3 4.0 V8 Coupé. It replaces the restrictive factory downpipe with a larger-bore pipe fitted with a high-flow sports catalyst in place of the standard unit, using a less dense substrate that flows significantly better than the factory cat while still treating the exhaust gases passing through it.
It sits between a stock downpipe and a full de-cat: a genuine flow gain suited to a Stage 1 or Stage 2 remap, without giving up the catalyst entirely the way a de-cat pipe does.
In the UK, a replacement catalyst on a car first registered from 1 March 2001 needs ECE R103 type-approval to be road legal, so check the EC Approved line in the specification for the version you choose.
Specifications
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System Type: Hi-Flow Sports Cat and Downpipe
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Pipe Diameter: 70mm (2.76")
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EC Approved: No
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Race System: Yes
Key Features
- Made from T304L aircraft-grade stainless steel, which is anti-magnetic and resists discolouration
- Mandrel-bent pipework keeps a constant diameter through every bend for unrestricted flow
- 70mm (2.76") pipework
- High-flow sports catalyst flows better than the dense factory unit while still treating exhaust gases
- Designed, developed and manufactured in the UK by Milltek Sport
Fitment
- BMW 3 Series E90 M3 4.0 V8 Saloon/Sedan (2007-2011)
- BMW 3 Series E92 M3 4.0 V8 Coupé (2007-2013)
- BMW 3 Series E93 M3 4.0 V8 Convertible (2007-2013)
Not suitable for: the BMW 3 Series F80 M3 & M3 Competition Saloon (Non OPF/GPF Models Only), which needs the Milltek Downpipes & Sports Cats BMW 3 Series F80 M3 & M3 Comp Saloon Non OPF/GPF 14-18.
Installation
Before ordering, note: For Milltek Sport Cat Back Systems Only. Requires a stage 2 ECU remap. Lambda wiring requires to be extended. This work involves removing parts close to the turbo and engine, so we recommend fitting by a specialist with a ramp and suitable software support.
Upgrade Further
Also available from Milltek for this car: Milltek Cat-back Exhaust BMW 3 Series E90 M3 4.0 V8 Saloon 07-11.
Will it fit the BMW 3 Series E92 M3 4.0 V8 Coupé?
Yes. Milltek lists this part for the BMW 3 Series E92 M3 4.0 V8 Coupé as well as the other models in the fitment list above.
Does it fit the BMW 3 Series F80 M3 & M3 Competition Saloon (Non OPF/GPF Models Only)?
No. For that car, choose the Milltek Downpipes & Sports Cats BMW 3 Series F80 M3 & M3 Comp Saloon Non OPF/GPF 14-18.
Is it road legal?
Milltek lists this as a race part without EC approval, so it is intended for off-road and competition use.
Do I need a remap?
Yes. Milltek notes: "For Milltek Sport Cat Back Systems Only. Requires a stage 2 ECU remap. Lambda wiring requires to be extended". Without suitable software the engine management is likely to log faults.
Can I use it with my standard exhaust?
No. Milltek states it must be fitted with the matching Milltek system, so budget for the cat-back as well.
How is a sports cat different from a de-cat?
A sports cat still contains a catalyst, just a less dense one that flows better than the factory unit. A de-cat removes the catalyst completely.
What is it made from?
T304L aircraft-grade stainless steel, which is anti-magnetic and resists discolouration better than lower grades.
Is there a warranty?
Yes. Milltek products are covered against defects in materials and workmanship. Contact us with your order number if you have a problem.
