Hi i just ordered my hedman headers 1 5/8 primaries so was wondering if anybody had any tips they they think might help.
Also how much horsepower should i gain ive got the all stock exhaust on my 305 tbi.

 

soak every bolt with penetrating oil real good.

 

well so far all of my bolts have been coming out just takes a little muscle.Also the last bolt thats on the drivers side second closest to the firewall i htink im going to have to go under the car for that one i hate those dam metal tabs they put on there **** me off.


cant wait till i get them on first im goin to start the car with just the headers and the y pipe on then im just goin to hear what it sounds like.Then i'll hook up the rest off the system.

 

Lots of penetrating lube and some heavy pulling they should come right out. I had to pull the last 2 bolts on the pass. side from underneath, everything else I could get to from the top. Those metal tabs suck, but mine were pretty well rusted to I just bent them up and they fell right off. You'll like it with just the y-pipe on, it's very loud but sounds good. I ran mine with open headers after I got them on. Good luck with the install.

 

yes, the 2nd to last bolts on each side seemed to be the biggest pain for me and a few other people ive talked to. must be a conspiracy. anyways, yes, it sounds awesome with only the headers and y-pipe. you should do what i did, get a cut-out so you can enjoy that sound anytime you want

 

I found really really really easy when i took off the a/c on the passanger side i didnt even have to go under the car when i was working on the passanger side.So much more room and looks alot better.How much off a horsepower gain should i get from this hedman headers with 1 5/8 and 3 inch y pipe.On my 305 TBI?