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coldkilla · 12-21-2005, 03:13 PM

Im wondering what would make more horsepower: my mac midlength headers running down into the mac y-pipe then into my high flow cat and having the outlet on the cat disconnected so the exhaust vents out after the cat OR hooking an slp loudmouth (cuz thats the kind of cat back i want) up to the cat and utilizing the cat back. the slp claims a good hp bump but that is over stock of course so it stands to reason that no restriction at all (not using a cat back) would make more power. i actually am not using my cat back now since the connecting flange that bolts to the cat broke (i think its a magnaflow, i dont know cuz it came w/the car and its unlabeled). im not worried about noise since it isnt that loud right now anyway and im not concerned with the emissions test since i can just hook up the cat back again. so, what should make more power?
oh and to all the smart asses (everyone), i dont care if open long tubes would make more power!!!

12-21-2005, 03:13 PM	#1
coldkilla Join Date: Feb 2005 Location: Cherry Hill Posts: 388 iTrader: (0)	what makes more sense? Im wondering what would make more horsepower: my mac midlength headers running down into the mac y-pipe then into my high flow cat and having the outlet on the cat disconnected so the exhaust vents out after the cat OR hooking an slp loudmouth (cuz thats the kind of cat back i want) up to the cat and utilizing the cat back. the slp claims a good hp bump but that is over stock of course so it stands to reason that no restriction at all (not using a cat back) would make more power. i actually am not using my cat back now since the connecting flange that bolts to the cat broke (i think its a magnaflow, i dont know cuz it came w/the car and its unlabeled). im not worried about noise since it isnt that loud right now anyway and im not concerned with the emissions test since i can just hook up the cat back again. so, what should make more power? oh and to all the smart asses (everyone), i dont care if open long tubes would make more power!!! __________________ 93 Formula: If it bolts on then I've got it, only some more expensive red tubes to add underneath and to go inside the engine and trans left. 09 G8 GT: Vararam OTR ram air, American Racing long tube headers with x-pipe, Vector 93 ECM/TCM tune, Magnaflow axle backs, MSD ignition coils, Spohn rear trailing and toe link arms, poly differential and subframe bushings, 20 inch aftermarket Camaro rims, brake upgrades.