Alrighty...I'm customizing my exhaust starting this Thursday...and working on it at my local pepboys until saturday night !

Here is my problem...I had a custom engine transfer...a 4.8L mustang conversion which worked...but...it had problems ( waste of time ) anyways...I put my old block back in... the Zetec 2.0 engine...this engine had no mods what so ever...so i'm deciding to work on the exhuast before heavy snow comes...

My question...
I have the K&N Air Filter coming in the mail...it will arrive tomorrow at my performance parts store, and i will begin installation thursday...my question is...with my current exhaust pipes that run under the car...can i put a high performance muffler on the car ? One of those huge one with the 6 inch exhaust tips ( only one...I think it's a flowmaster...

My friend said it was ok...cause he did the same to his Civic...and it boosted his horse power +40 or so...and gave it a really nice sound and thats rare with Honda Vechicles.