5.3bully

Just put some headers on my 03 silverado and first start up a got a bad manifold leak. Any ideas how I can fix it? I bought my headers for dna performance. Came with new bolts and gaskets

GM1697

iTrader: (1)

Try using factory GM gaskets and not the ones they send you. Those tend to be garbage.

DNA are from ebay correct? With the weird primary going up on the drivers side? You may have got a set with a warped flange.

5.3bully

I got the headers from pro tuning lab.com. there shorty headers and do you think I can get those gaskets at a general auto parts store?

parks450

iTrader: (18)

Agree with above, usually they come with **** gaskets. You can get them from a dealer, some parts stores have the GM MLS gaskets. All else fails they are cheap on amazon prime and only two day shipping.

5.3bully

I'll give that a try. It just really pissed me off when you spend all that time putting new ones on then it sounds like crap when you start it

parks450

iTrader: (18)

Yes, know me one time to learn haha. I used header studs so I had to loosen the header as well to slide it off the studs.

GM1697

iTrader: (1)

Rockauto carries them for $9 a piece

ACDELCO #12617944

5.3bully

Thanks for the help. I'll give it a try to see if it works

GM1697

iTrader: (1)

Another thing to note, is that headers will increase valvetrain noise.

So motor will seem louder, mine sounded like a sewing machine on steroids when I combined the cam with headers.

5.3bully

Ya mine definitely sounds like a leak. Sounds like at Ford f150. I ended up getting felpro gaskets. I'll see if them work better