I am told this will possibly reduce the cabin heat and maybe improve the sound a bit. Roe has 2 1/2" high flow units that are a bolt in with 17-22hp claimed. Partsrack has less expensive "mid flow" Random tech units that look like welding is required. Anyone know how these two compare? On a non Viperclub approved vendors site I saw a Random Tech cat offered for the Viper where it mentioned an installation kit was required. Could this be a different cat from the one offered by Partsrack? Anyone?
Cat upgrade on otherwise stock exhaust. Recommendations?
- Thread starter Nuck
- Start date
DrDJ
Enthusiast
You may want to ask if anyone has any spare aftermarket cats for sale and go with what is available. There's not much difference between the two.
DrDJ
DrDJ
red98RT10
Enthusiast
Or....you could just do a cat delete! This is cheap, easy, and makes the exhaust sound great! 
CitySnake
Enthusiast
I've got Sean's ovals with an otherwise stock system on a Gen 2. The HF cats DO make the side sills cooler and make the exhaust note slightly louder, though far quieter than the aftermarked cat back systems. If you've ever picked up the stock Gen 2 cats, you also see how much weight you save.
2000gtsgsxr1000
Enthusiast
Get a recip saw and have at it.If you can remove them do it.I just took mine off and had a Mustang guy say it was the best sounding Viper he has ever heard.I also have a Borla catback so it isn't too loud.
OSUbrew
Enthusiast
Would the biggest power gains be from just removing the cats completely?
Russ M
Enthusiast
Just remove the cats.
The aftermarket cats will still cause the side sills to get very hot.
Main reason to remove the cats should be cabin heat and side sill health. Power is just an added bonus.
The aftermarket cats will still cause the side sills to get very hot.
Main reason to remove the cats should be cabin heat and side sill health. Power is just an added bonus.
kcobean
Enthusiast
Just don't forget why the cats are there in the first place...Emissions in my neck of the woods are a serious PITA and I'll never do another OBD-II compliant car without cats again.
If you mentioned the year / model I MISSED IT. The Year Matters.
If you had an email in your profile, I could have replied there.
If you call, I will help you.
ViperJames
Enthusiast
I have a 95 (side exhaust) and did the Roe Hi/flow cats with the exhaust at the same time. Definitely GREATLY reduced cabin heat and side sill heat. Not 100%, but more than 50% which I felt was great....JonB is right....Your year totally matters though...Give him a call he will take care of you!
