The M101 'Off-Road' 4-inch Cat-less Exhaust Adapter improves performance and reliability of your oversized turbo by reducing backpressure at the turbo outlet. When combined with an oversized exhaust, the added volume of this 4-inch adapter allows rapid expansion of exhaust gasses at the turbo outlet which means less backpressure, better reliability, and improved performance. This product eliminates the catalytic converter.

This product is for off-road and race track use only. 

For the following models:

2014-2023 F56 MINI Cooper and Cooper S Hardtop
2015-2023 F55 MINI Cooper and Cooper S Hardtop 4-Door
2016-2023 F57 MINI Cooper and Cooper S Convertible
2016-2023 F54 MINI Cooper and Cooper S Clubman
2017-2023 F60 MINI Cooper and Cooper S Countryman

When you have a big turbo, you need the extra safety of an oversized exhaust with less backpressure to accommodate the extra flow from your big turbo. The M101 Exhaust Adapter is the largest exhaust adapter currently available for the Mini Cooper. It is full 4" from turbo to the swedge outlet (slip over 4”) and it will work with all upgraded turbos on the market and most exhaust systems.

The M101 is made of back purged tig welded 4" stainless steel that does not reduce at any point and has a 4" or 101.6mm outlet. It can be easily adapted with no cutting to any exhaust from the factory 2.25” all the way up to 4” (adapter is sold separately).

M101 Specs:

• Pipe DIA of 4" (101.6mm)
• Stainless Steel
• Mandrel Bent Elbow
• Back Purged and Tig Welded
• Outlet 4" swedge (enlarged to fit over 4" pipe)

Parts included:

• 4" V ban clamp
• 4" gasket
• M101 Exhaust Adapter

Application/Fitment

• Hardtop F56 3cyl (non S) and 4cyl S, JCW, and GP year 2014 to current
• Hardtop 4-door F55 3cyl (non S) and 4cyl S, JCW, year 2015 current 
• Cabrio F57 3cyl (non S) and 4cyl S, JCW, year 2016 to current
• Clubman F54 3cyl (non S) and 4cyl S, JCW, year 2016 to current
• Countryman F60 3cyl (non S) and 4cyl S, JCW, year 2017 to current

Notes:

• The M101 attaches to the factory turbo but has a 4" 101,6mm outlet. For exhausts less than 4 inches diameter, an adapter will be required. All factory brackets and hangers are retained. Contact Mini Mania for additional information. <[email protected]>
• This product will cause the check engine light to illuminate for the missing catalytic converter