BMW 335i 435i N55 Intercooler and Decat Downpipe – FMIC and Catless Downpipe Upgrade for BMW N55
Transform your BMW N55 with this performance front mount intercooler and decat downpipe package. The BMW N55 intercooler upgrade and BMW N55 de-cat downpipe deliver lower intake temperatures, faster turbo spool, stronger mid-range torque and a more aggressive exhaust note. Perfect for enthusiasts seeking a plug-and-play BMW 335i intercooler, BMW 435i intercooler, BMW M135i intercooler and BMW N55 catless downpipe solution.
Fitment – plug and play for the following N55 models
- BMW M135i July 2013 onwards
- BMW M235i July 2013 onwards
- BMW M2 all models
- BMW 335i July 2013 onwards
- BMW 435i July 2013 onwards
Intercooler upgrade highlights
- Engineered bar and plate core with flowed cast end tanks for maximum cooling efficiency
- Massive 5 inch competition core with 4 extra rows at the front to increase surface area
- Internal fin on the intake side directs airflow through the top 4 extra cores
- Near 100 percent more volume and 90 percent more surface area than the standard intercooler
- Dimensions 520 mm x 210 mm x 130 mm
- Weight 11.5 kg
- Direct fit BMW N55 FMIC upgrade – plug and play, typically 1 to 2 hours install time
Real-world cooling performance
Tested back-to-back against the standard intercooler over five consecutive road pulls, both intercoolers saw intake-side temperatures of 135 to 140 degrees. At the outlet into the engine, the standard intercooler recorded 75 to 80 degrees, while the MTC intercooler consistently delivered temperatures in the high 20s across all five runs. Lower intake air temperatures mean repeatable performance, reduced heat soak and more reliable power on the road and track.
Decat downpipe features
- Machined from T304 high grade stainless steel and TIG welded
- UK fabricated with 10 to 12 mm laser cut flanges
- Sharper throttle response thanks to faster turbo spool
- Noticeable power gains and a deeper, more aggressive exhaust note
- Reduced temperatures and exhaust backpressure to relieve the turbocharger and increase cylinder charge
- Significant weight saving versus the factory catalytic converter
- Mandrel bent for superior gas flow and maximum internal diameter without sacrificing mid-range torque
This decat will fit all N55 engines from July 2013 onwards. It will not fit the 135i pre July 2013. We also supply a version for the earlier 135i in our other items.
Proven gains
Tested increases of 10 to 15 bhp from the decat downpipe, with improved spool and response when combined with the BMW N55 front mount intercooler upgrade.
Why buy from Nforcd
We have used and fitted this BMW N55 intercooler and de-cat downpipe package in-house and customer feedback has been excellent. The combination is a proven BMW 335i downpipe and BMW 435i downpipe upgrade that pairs perfectly with the high efficiency FMIC for consistent, repeatable performance. For professional fitting in Warwickshire, contact Nforcd for a quote at Sales@nforcd.com.
Installation and recommendations
- Professional installation recommended, as exhaust tolerances vary slightly by car
- Typical fitting time 1 to 2 hours for the intercooler
- We recommend Lambda Sensor Spacer(s) to help prevent the engine light in most cases
- There are useful installation videos available on YouTube for guidance
What you get
- Front mount 5 inch competition intercooler for BMW N55
- Stainless steel BMW N55 decat downpipe
- Lifetime warranty on this product
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