cat's

84'GMC4x4

LawnSite Member
Location
MA
well, i've pretty much resigned myself to putting cat's on my non-cat truck so it will pass the MA state inspection emissions test.
flipping through my Jeg's catalog i see Dynomax super converter's. they have 2-way converter's for $119.99 and 3-way converter's for $50.99.
my question is, what is the difference between the 2-way and 3-way converter's? going by the old axiom "you get what you pay for" i'm assuming that the 2-way is better in some way, but if anyone knows why i would appreciate any insight.
i also have headers into straight dual exhaust if that makes any difference.

greg
 

roland26

LawnSite Member
talk too the local inspector and ask him what you have too have to pass. I cat or two. I have a 84 with hedders, a complete 3" system (single). I ordered a 3" hi flo cat from summit,ask them they will tell you. I also use a 3" hooker maxiflow muff from summit. nice sound. I was having trouble
with the way the truck was running. after the change to the hi flow cat, hooker muffler, and a 4"k&n air filter. the truck came alive. roland
 

John DiMartino

LawnSite Silver Member
Location
Walden,NY
If you plan on keeping the Cats on after the inspection,make sure the ones you get are rated forthe GVWR of your truck,cheaper convertors arent meant for high GVWR trucks,you need a truck convertor,if you tow,or eventually you will experience a meltdown of the convertor.
 

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