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Gibson Headers And Borla Catback

croberts

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croberts Enthusiast

croberts

Posted
Posted

I recently installed a Borla cat back on my 4.8L 04 Sierra. I was pleased with the set up when I unpacked it from the boxes, but the warm fuzzy feeling soon slipped away when I began the install.

The pipes existing the muffler were different lengths and the pipes did not line up no matter what I tried, I began installing the system loosely and tightened the set up from the cats back, nothing worked. The passenger side pipe touches the dust shield on the shock and I had to bend the pipes and trim a little off the passenger side pipe to have my tips the same distance back from the bumper. I thought the few extra bucks I payed for the Borla would have saved me the grief. I guess the extra cash was for the 304ss the system is made from. Any way enough complaining.

My question is regarding headers, I have the inner most exhaust manifold bolt heads missing on A and B cylinder banks, so I have to get it fixed. The manifolds are almost surely warped, so a set of shorty headers are my next project. I have looked at Gibson and seem to think they are work the money, but will I have similar problems with fit up as I did with the C back? Looking for some input on Gibson or any other brand. I prefer to do my own work so any tips on removing badly rusted bolts from an Aluminum head would also be welcomed. I know I should be looking at long tubes but, I'm a little lazy just what a simple bolt on.

gregrocks89 Senior Enthusiast

gregrocks89

Posted
Posted

i have edelbrock shortys and their ok. like i noticed some difference in power and it DOES make the truck abit louder. I didnt have any problems installing them. Just dont cheap out on gaskets. I use fel-pro gaskets on my truck and i got no complaints. Just watch the donut gaskets. I seem to burn them more but then again im running edelbrock. Not always a good choice with them haha. But install wise shit takes me not even 20min to install them. Getting the old manifold off can be a bastard. Try not to damage the down pipe while getting them off

gregrocks89 Senior Enthusiast

gregrocks89

Posted
Posted

also a penetrating oil would work thats how i got mine off. just soak the shit outta them and let them sit for some bit and then slowly turn the bolts out. dont force anything or you will break

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