IMR G80 3.3L 2.5" Catless Secondary Downpipe

This is the initial release of the preorder group buy. As of March 15th, products will take 6-8 weeks to be delivered.. We expect to start shipping these by May the first or second  week in May. This preorder helps us to purchase purchase raw materials in bulk to for your uniquely designed flanges and bends. 

IMR has developed a set of  secondary downpipes to enhance the power of your 3.3L Twin Turbo performance car. This design upgrades the stock pipes by .5+ inches to 2.5" This will allow your the air to flow faster from your engine and through the turbines in your turbo. We have integrated a flex section to allow engine movement. The flex section also helps accommodate manufacturing variation from on brand to another incase of a slight misalignment in other brands products. We recommend using all IMR products. These downpipes are made to fit like the OEM pipes.  The end result is faster spool of your OEM or aftermarket turbos. This will compliment our down pipes and cat-back systems which are currently available. 

-304 Stainless Piping

-304 Stainless Flanges (won't rust and won't warp with proper welding skills)

We now carry mini 02 sensor cats that eliminate P0420 codes. The cat attached to the sensor and doesn't impede exhaust flow. This item will need to be placed on your 02 sensor bung for the secondary downpipe.  The o2 sensor will then be installed in this o2 sensor cat. The primary downpipe should never have the o2 sensor cat in the upstream bung near the turbo. 

Go Catless for more power and faster spool!!! 

Catless secondary down pipes by themselves don't require a tune to maximize performance and avoid overboost.