BMW G42 M240I Downpipe 200 Cell High Flow Cat by DCE Parts

This BMW G42 M240i just got a fantastic upgrade with the BMW G42 M240i Downpipe by DCE Parts. Doesn't this just sound amazing? Even with the stock OPF Catback, the BMW G42 M240i with the B58 DCE Parts 200 Cell High Flow Catalytic Converter G42 M240i Downpipe sounds so much throatier. In our opinion, one of the best sounding B58 G-Series BMW's from the factory. With the B58 DCE Parts BMW G42 M240i Downpipe you just improve the driving experience even more.

Installing the B58 downpipe was a very straightforward process, taking about one hour to 1.5 hours to do so on a proper lift. The B58 BMW G42 M240i Downpipe has a perfect fitment for the G42 M240i. We've installed the BMW G42 M240i Downpipe by DCE Parts and made a cool sound clip of the results. 

With the BMW G42 M240i Downpipe for the B58 engines with OPF, you will be able to reach huge performance gains without a lot of added modifications. This specific BMW G42 M240i has got the Eventuri upgrade, the DCE Parts BMW G42 M240i Downpipe and a piggy-back ECU remap, reaching performance figures from a stock 395HP and 562NM to 465HP and 715NM on the dyno. This is a 18% increase in HP and 27% increase in torque, transforming the car in a whole new beast.

The DCE Parts 200 Cell BMW G42 M240i Downpipe is an affordable upgrade which allows for a lot of tuning potential. With this modification, you will be able to unlock a lot of hidden performance. The DCE Parts BMW G42 M240i Downpipe makes it sound much more aggressive, while maintaining a lot of the comfort on board, basically being just as loud as stock in the car.

The Eventuri upgrade used on this BMW G42 M240i

Dutch & EU Customers

For EU customers, we have the DCE Parts B58 OPF V-Band Style downpipe available through this link.

DCE Parts B58 OPF V-Band Style Downpipe

The downpipe is also available with High Flow Cats

DCE Parts B58 OPF V-Band Downpipe High Flow Catalytic Converter

AUTOID - United Kingdom

For customers from the United Kingdom, we are happy direct you to AUTOID. Feel free to follow this link to purchase the downpipe from AUTOID's stock. They offer great service and will be able to supply you the G42 downpipe very quickly. They also installed the DCE Parts BMW G42 M240i Downpipe onto their demo car, coupled with the BMW G42 M240i Milltek Catback. It sounds just insane!

AUTOID Shop DCE Parts B58 OPF V-Band Downpipe

Despite being affordable, the DCE Parts BMW G42 M240i Downpipe fitment was great. The DCE Parts BMW G42 M240i Downpipe has been redeveloped for the BMW G42 2 Coupe, there were minor differences compared to the G2X M340i cars that required a small redesign. DCE Parts changed the downpipe to fit the BMW G42 M240i perfectly.

With this customer, we've chosen to keep the OEM catback as the performance upgrade was already on the table and the customer didn't want it to be too loud.

When you opt for a Catless B58 Downpipe , it automatically means you will need a ECU tune, piggy-back tuner or Cat-deleter to prevent the CEL from appearing onto your dashboard.

Please take into consideration that at the time of writing (January 2023) the 2020+ ECU have not been openly cracked for tuners to get into yet, which means the ECU have to be shipped physically to a tuner that is able to crack the ECU. Other solutions will be mentioned below.

With the OPF BMW B58 Downpipe versions, a High Flow Catted Downpipe is likely not enough to prevent the CEL due to a reduced back pressure in the exhaust when you're just changing the downpipe. While this brings performance benefits, the downside is that the ECU will measure a reduced back pressure and throw a CEL. The BMW G42 M240i with OPF from the factory will throw the CEL eventually.

Possible solutions for the OPF equipped vehicles with a 2020+ ECU are the LEIB OPF and CAT Deleter, which is essentially a small connector which tricks the ECU in thinking the OPF and CAT is still present. The LEIB solution is Plug & Play installation in about 60 minutes without cutting or soldering. It is not detectable for the BMW dealer and also reversible for those who want to remove it afterwards. We recommend this solution for those who want a more aggressive sound, but not necessarily want to tune the engine yet.

• LEIB OPF and CAT Deleter (no Performance Tune, only prevents CEL)
• Piggy-back ECU Tuner with OPF and CAT Deleter (Performance Tune Possible)

Notes

• Please check the outlet type of your OEM Downpipe, this part is suitable for vehicle with the OPF & V-Band Flange Type. Please note that the downpipe only fit on cars with OPF and V-Band Flange Type.
• Vehicles with OPF Filters will need software modifications or OPF Deleters to prevent the EML from appearing.