318 build advise

Engine power wise, headers and dual exhaust. Here in the USofA, a company called Summit racing
( Summit Racing | Aftermarket Parts & Accessories, OEM Auto Parts )

Has a very nice dual exhaust system that bolts together nicely with the recommended headers. Use the 2-1/2 size pipe. I selected the kit without mufflers and ordered the Summit brand turbo muffler because it doesn’t neck down in tube size inside the muffler. It is 2-1/2 all the way through. Very good fit, minor trimming/cutting of the pipes for a near perfect fit, easy to install yourself, sounds great and ready for 400+ hp.

For the cars acceleration, off the line, more gear is the way to go. Numerically raising the ratio, in example, 2.76 gears to 3.55 gears allows you to get up and going faster, but may limit top end speed or hinder Hwy cruising since you’ll cruise at a higher rpm. When you do the gear change, LOL, you may want to get wider tires...


But one step at a time.