I guess you never herd of these terms? This is what you loose when your header isn't set for an open style exhaust...... When you look at the bigger companies in the biz, many factors play into the design of the header for proper use. Most of the stuff we buy over the counter is designed with...
There is a member on here PrjctLxEnvy, he had his car worked on by a local guy (westchester) and it came out really nice. From what I understand he has a killer notchabck also!Mybe he can give you his number and could help you out.
Well first off you need to find out how many cylinders are misfireing... Is it all the time? Only at certain rpm range????? Did a injector take a shit? When you did the swap is everthing connected, is the dizzy in right? You need to go thru everything one step at a time and recheck everything...