I have a 1993 civic 1.5 LSI and i have had a mugen 4-2-1 manifold and straight through hi flow cat fitted, i tore a slash in the cat where there was not enough pressure escaping out the backbox so i replaced the cat with a new high flow one and then changed backbox with a mugen style twinloop back box (Love the sound) which has a 4" oulet, i think it feels slower now then it did with the standard backbox, appart from when im raggin the s**t out of it, and it drinks petrol like its a 2.0 litre.i reset my ECU when i had the full system fitted and cleaned my K&N. Have i got a too big backbox because of the twin loop and only a 1.5 ??? do i not have enough compression?

 

why post twice in the same forum?

https://honda-tech.com/zerothread?id=1511282

careful, you are a trial user, you can only have 5 posts within a given 24hr period. Use them wisely.

Cheers.

 

sorry im just desperate for some advise, how do you become a member??