1646958 Posted August 19, 2017 Share Posted August 19, 2017 Is there any real advantages to be gained by removing the Cat on a duretech. Link to comment Share on other sites More sharing options...
sjl1 Posted August 19, 2017 Share Posted August 19, 2017 I was recently advised by a respected engine builder that for a 310 sigma this was definitely a worthwhile upgrade seeing 10bhp improvements in midrange performance. I have ordered one and will report back Link to comment Share on other sites More sharing options...
John Vine Posted August 19, 2017 Share Posted August 19, 2017 I removed the cat from my R400D some years ago, but this was to avoid damage while suffering from a bout of misfiring, rather than to improve performance. The only real difference I've noticed is a more pronounced rasp in the exhaust note.JV Link to comment Share on other sites More sharing options...
mikeo996 Posted August 19, 2017 Share Posted August 19, 2017 Difference in sound is night and day, but some have actually found a drop in bhp without. Link to comment Share on other sites More sharing options...
1646958 Posted August 19, 2017 Author Share Posted August 19, 2017 Many thanks J Link to comment Share on other sites More sharing options...
1646958 Posted August 19, 2017 Author Share Posted August 19, 2017 Many thanks J Link to comment Share on other sites More sharing options...
sjl1 Posted August 22, 2017 Share Posted August 22, 2017 My 310r bypass pipe has arrived and i am looking forward to hearing how much noisier it makes the car.Am also planning to get it rolling roaded to compare the difference, hoping for improved midrange Link to comment Share on other sites More sharing options...
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