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Two Active Autowerke stainless stubbies with mounting tabs, viewed from the open ends

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Active Autowerke stubby pair standing upright with the mounting tab showing

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Factory E9X M3 primary cat cut down and welded to an Active Autowerke stubby

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Active Autowerke E9X M3 X-Pipe Stubbies

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Brand: Active AutoWerkeSKU / Part #: 11-020

Regular price: $315.40
Regular price: ~~$332.00~~
Sale price: $315.40
Unit price: per

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Subtotal: $315.40

Quantity:

Active Autowerke E9X M3 X-Pipe Stubbies

Subtotal: $315.40

Not sure it fits? Text us your VINSee all fitment

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Overview

The Active Autowerke Stubbies let E9X M3 owners who run the Signature X-pipe put their factory primary catalytic converters back in the system. They are a low-cost alternative to buying a separate set of high-flow cats, and they are sold as a set of two.

The factory cats are not included; you reuse the ones that came off your car.

What It Does

The front section of the Signature X-pipe comes off with its V-band clamps. A competent fabricator cuts down your factory primary cats and welds a stubby to each, turning them into a compact pair that drops in where the X-pipe front pipes were. From then on you can swap between the straight pipes for the track and the cats for the street as often as you like, since there are no gaskets to replace. The X-pipe keeps its performance either way, and the shorter factory cats are also easier to store.

Materials and Construction

Stainless steel stubby adapters with a mounting tab for each side. Installation requires cutting and welding the factory cats, which should be done by someone experienced.

Features

Sold as a pair
Reuses your factory primary cats
Swap street and track front pipes in minutes
No gaskets needed for repeated installs
Compact, modular package

What Is Included

Two stainless stubby adapters
Factory cats are not included

Specs

Part number: 11-020
Brand: Active Autowerke
Type: X-pipe cat adapters (pair)
Material: stainless steel
Engine: BMW S65 4.0L V8
Shipping weight (Active Autowerke): 2 lb (0.9 kg)

Fitment Notes

Requires the Active Autowerke Signature X-pipe and your factory primary cats.
Cutting and welding of the factory cats is required.
Active Autowerke fitment applies to US-model cars only.
Questions before you order? Call or text (310) 231-0292 or email Online@AutoTalent.com.
Shop the Active Autowerke exhaust range or the full Active Autowerke line.

FAQ

Are the cats included?
No. You reuse your factory primary cats.

Do I need welding?
Yes. The factory cats must be cut down and welded to the stubbies.

How many come in the box?
Two, one per bank.

Year	Make	Model	Chassis	Engine
2008-2011	BMW	M3 Sedan	E90	4.0L V8 (S65)
2008-2013	BMW	M3 Coupe	E92	4.0L V8 (S65)
2008-2013	BMW	M3 Convertible	E93	4.0L V8 (S65)

Fitment

Year	Make	Model
2008–2011	BMW	M3
2008–2013	BMW	M3

Not sure? Text us your VIN and we’ll confirm.

Shipping & returns

Shipping: Orders ship via UPS, FedEx or USPS, from our facility near Los Angeles or directly from the manufacturer. Rates for many items are weight-based and shown at checkout. If you need it by a certain date, text us before you order.

Returns: Unused items in brand-new condition and original packaging can be returned within 30 days of the invoice date, with a 25% restocking fee unless otherwise specified. In some cases we can offer a lower fee with the balance as store credit. Shipping charges aren't refundable in either direction unless approved by AutoTalent.

Not returnable: special-order or custom items, and anything that has been installed, modified or altered.

Cancellations: free if the item is out of stock or we miss the ETA you agreed to. Other cancellations carry a 5% processing fee to cover card fees we can't recover. Special-order items can't be cancelled.

Damaged in transit? Report it to the carrier and to us within 48 hours, keep all packaging, and don't send anything back without our written approval.

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