There are too many variables that determine what hp increase headers will give. Engine size, carbed,f.i.,stock,hi perforforman ce,car weight,the list goes on and on....
10hp
yes
bout 10 to 25. depending on what size of motor
adding headers will allow engine to breath better and boost up horsepower but not by much, headers also make you vehicle louder with pipes.
20-25 as a rule of thumb. More with good heads.
if you can find the hp. of the eng., you can add between 12-20 more hp. for the headers.
Not enough to even notice.
God, where to start? there are a LOT of things you can do to add horsepower. How much money are you looking to spend? here's a list of things you can do: cold air intake, swapping exhaust manifolds to headers, changing to a high flow exhaust system, turbo/supercharger, nitrous, aftermarket computer chips, lightweight camshaft gears, bigger camshafts, bigger engine, aftermarket clutch, aftermarket torque converter, etc.etc.etc.etc. There's a helluva lot you can do. It's all in how much money you wanna spend. Agreed. LT headers/cold air intake/catback/tune REALLY wake these bad boys up though
Not much, I wouldnt exspect it to b the diffrence from burnin rubber or not, maybe 5 - 10
Start with a cold air intake, then add headers. If you want 100 or more horsepower instantly add nitrous
Very little. It is better to have duals instead of single as it is harder for the car to breath. But it can add 5-10 horse.
Yes, you can put headers on and use your existing carburator. You may, however, want or need to tune it, depending on how it runs after the headers are installed.