Took my broken 034 Motorsport exhaust mid-pipe to a shop to have them weld the reducer back onto the catalytic converter.
While fixing that weld they noted that two other welds were cracking, making three out of four welds on the cats bad. They re-welded all of them.
I’m disappointed with the quality of the work put into this exhaust, in light of how expensive this product is I’m further disappointed.
With stock K03’s, fueling, and MAF sensor the EGT model had proven to be a close match to the readings recorded via the full range RS6 EGT sensors on my car.
With my conversion over to RS4 K04’s, RS4 MAF sensor, and Bosch 72# EV14 fuel injectors I looked once more at how the modeled EGT’s compared with the readings from the RS6 EGT sensors.
With this setup on the street the modeled temperatures are becoming less accurate. The mid-range modeled temperatures exceed those recorded by the sensors.
I was out the other day doing a pull when bang… braaa (very loud exhaust). “What the heck was that?” My first thought was a v-band clamp holding the mid-pipe to the downpipe let go and the exhaust separated. I brought the car back to the garage and took a look underneath:
Oh, that’s not good. Something on my 034 Motorsport exhaust system failed. I detached the mid-pipes for a better look:
A clean break right where the reducer attaches to the catalytic converter. Great, car is down and now I need to find a shop to weld it back together.