You'd be better off w/ a header, than a staight pipe & what about five oh? As far as hp, I believe 136 for the 20 & 145-151 for the 23.whats the hp on a stock focus? and how much would the hp increase with a custom straight pipe exhaust? can anyone tell me?
Yeah the automatic saps a bit more power because its a fluid coupling and not a mechanical one.i have an automatic. so another words i have very sickening small amount of horses? considering my straight pipe. how much would an sri bump my hp up to? roughly? i mean i know catback give 5-8 in increase but ive never really found a rough estimate for intakes