Engine specific. T he headers need to bolt onto the exhaust ports on the engine so regardless of the car the engine must be the same
adding headers will allow engine to breath better and boost up horsepower but not by much, headers also make you vehicle louder with pipes.
It does depend on the engine, but I'd shoot a little higher and say headers will give a good 15-30 hp 3 or 4 hp depending on the engine
Several companies manufacture headers specifically designed to fit a 455 Buick engine, including TA Performance, Hedman Hedders, and Doug's Headers. These manufacturers offer various designs and materials to optimize performance and fitment for enthusiasts and restorers. It's important to consider factors like intended use, exhaust system compatibility, and any modifications when selecting headers for a 455 Buick. Always check for specific compatibility with your vehicle's year and model.
Depends on the specific engine, need to know what vehicle and year.
Adding headers and a cold air intake can typically increase horsepower by 10-30 hp, depending on the specific vehicle and other modifications. These upgrades can improve airflow into and out of the engine, allowing it to breathe more efficiently and produce more power. It is always recommended to combine these upgrades with a tune to fully optimize performance gains.
usually
What engine and car they were designed to fit.
5-15+ depending on vehicle and type of headers.
You will have to remove the engine.
An engine has one header(exhaust manifold) for each cylinder head it has.
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.
be more specific on vehicle type