I have a 75 coupe that I am in the process of installing the 68/69 style side pipers. That said I would like to bump up my horsepower. Without being able to install headers because of the side pipes How limited will I be? Will the pipes increase my airflow enough to allow me some changes to beef up the engine or is there too much of a restriction with them. I look forward to your input.

Kevin

 

Who says you need to keep stock manifolds to use sidepipes? Hooker makes side pipe header kits for the C-3 that should flow excellent for a huge amount of horsepower. For the engine mods, it goes how much money you got? How much horspower you want? If you want check out a another thread going in this forum, its about Jet hot side pipe headers.Tumarr38440.5004282407

How much of a bump?  Those pipes will allow for a lot of air flow increase.  You can start with the basic intake manifold and or roller 1.6 ratios rockers.  You can go to a cam and lifters.  A set of performance heads is another option.  There are many things you can do.

Bottom line,  "How fast do you want to go?  How much do you want to spend?"

Still true.

Hedman Hedders makes tubed headers for factory style side pipe systems.