The answer would be "No, you don't have to". If you installed exhaust headers to improve performance then you might consider if your current exhaust system compliments the headers. Headers are designed to help evacuate exhaust gases and minimize back pressure. If an engine has exhaust headers that collect into a small single muffler and pipe then the effort is somewhat defeated. BUT, if the headers are installed for the "cool factor", and there is nothing wrong with that, then go ahead and use the stock pipes or as much as you can.
Yes, you can. There is plenty of offers in the Net for that. Technically, you cannot put headerS on the engine, but you can put A header (unless of course, you want to do a true dual exhaust system and get a custom set of headers, but that would be very un-4 banger like)
I've seen a 04 Grand Prix with a LS1, so I would say yes but lots of custom fab on mating the engine to the transmission/flexplate and headers/exhaust.
If you think about it yes they would cause headers flow better but when I say they will I'm not sure how much louder they will make your vehicle.
I would say it all depends on your intake and exhaust system. I run mine with stock headers, nismo duel rai and 60mm invidia n1 exhaust...runs great with stock headers.. remember, just because it is aftermarket does not mean better...
If the Car is taking on the smell of gasonline while on and running it usually means that the car has an exhaust leak. more than likely around the headers. I would have the exhaust system checked out.
Exhaust of an engine is a gas.
f an automobile had a 100 efficient engine would it exhaust the surroundings?
It would be a waste of time and money. You would have to make a special adapter to hook the exhaust to the manifold. On a turbo header, the exhaust hooks to the turbo and the turbo to the manifold.
Could be overheated coolant or just leaked oil burning off your exhaust headers
I would say it is the exhaust system.
Depends on which 350 it has. One has about 240 hp and another engine offered in 71 was a 270 horsepower 350. With an exhuast and the mild cam I would place it give or take around 20-25 hp more than the original stats. Headers would be a big gain with the aftermarket exhaust.