hey guys im new to the scooby crew with my 08 wrx. It came with a invidia catless downpipe with flowmaster exhaust along with a bigger turbo, injectors, injen cai, d2 coils. It has been tuned. My question is if i was to replace the invidia catless with a catted downpipe do i need to retune? i want to quiet the exhaust down a lil bit due to my baby being in the car and also to get rid of the horrible smell. Your thoughts are appreciated. also was thinking of getting the q300 exhaust also.
also got one other question. when i was driving home the car interior smelled like gas. I popped the hood and on the top right side by the hoses was where the smell was coming from. i didnt see any leaks though. The previous owner stated that if he doenst start the car in awhile this is what happens. Do you guys know anything of this? I read that in the 02-04 cars that there was a fuel smell problem when it was cold out but anything with the 08-10 models?