I'm 99.9% certain this is not a header leak, but I just wanted to ask to be certain (just got my headers and hfc's installed) - in 1st gear from 4k to 7k RPM it sounds like my engine has a blow-off valve - under WOT it makes a REALLY loud TSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSS sound - I first thought this was a header leak, but it's only in 1st, only at that RPM range, and oddly enough, previously (from the spacer) in that range I was a whistling sound, so I guess headers + hfc + spacer = TSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSS instead of a whistling noise?

I have no sudden loss of power anywhere in the curve, no hissing sound at idle, and like i said, only udner WOT in 1st gear from 4-7k

.....in any case, the TSSSSSSSSSSSSSSSSSSSSSSSSSS is pretty cool ^_^ (As long as it isn't a leak ^_^ )

 

I know wut u mean... i have that tsssssss noise too, and i'm almost sure its not a leak. As davidv once said (wut a wise man), the more air you move, th emore noises will come...

 

Tsssssssssssssssssssssssssssssssssssssssssssssssssssssssssss s