I just installed the ottp longtube header and its sounds great. However, from inside the car with windows up you can hear a loud sucking or wooshing sound coming from where the header goes down to the rest of the exhaust. do you guys think its a leak or just the exhaust gas being pushed down the longtubes?

 

hmmm, good community huh

 

No. Thats is the sound of the exhaust gases being pushed through the header/downpipe.

You will normally hear that sound on a high flow setup.

An exhaust leak is more of a ticking sound.

 

I wondered the same thing when I installed my Ottp longtube haha. It's normal