Hi guys, bin lurking but now could do with some advice. Have cut the cat converter out of my 3.2 petrol which gave it a bit more get up and go. Replaced the air filter with a repoco dropin about a year ago and was going to bite the bullet and use a K&N next time. Will this filter and exhaust mod have much effect on the air/fuel mixture? Will it need remapping or what ever they do to alter mixture? Tailpipe looks a bit rich also. Would like to get the thing running as well as possible. As you all are aware they aren't too miserly on gas Towing 5.3 boat back from Ak it was doing about 6km/L So should be about 8km/L without it. Much appreciate any help/advice.
regards
M2H