I need guidance

I think you are on the right track with the recommendations made.

You have a stock 318 so I wouldn't bother with headers. With the roads in your area, if you did go with headers, you would need Doug's or TTI to avoid low hanging header tubes. Both Doug's and TTI headers are expensive $500-$700ish.

2 1/4" is fine for a stock 318.


I would pull everything off. Check the manifolds for cracks (visual inspection) and have a new dual system bent (at a local, competent, exhaust shop) and ran all the way out the back.

Have the guy put in a "H" pipe if your budget allows.



Please note……

My recommendation is based on a stock or lightly modified 318 (as mentioned in your post). If you have plans in the future to make significant changes to your engine, your exhaust system needs will also change.