sunofwolf
Well-Known Member
- 2,376
- 178
- Vehicle Model
- Civic SI
- Body Style
- Coupe
someone said the 2.5 exhaust is good up to 20 pds of boost-then it effects power on a Honda SI. A non boosted car SI doesn't need a 3" inch exhaust when a 2.5 inch does the same power output and the 2.5 inch is less noisy, easy to put on, lighter too. I have a 3" on my srt-4 but it is boosted and can hit 20pds of boost-never had a problem with the exhaust-it's SS with a SS muffler too and a high flow cat-also have a delete cat pipe -not in use -too noisy and stinky. Who ever is making this exhaust Honda SI isn't doing a very good job.