Im having trouble figuring out which cat to buy from this site.

http://performance.autopartsperformance.com/

if you go to that site select nissan 240sx and its a 89 then when you go under catalytic converter, it goes to 3.8L Max or 5.8L Max which is the same as it is on the pacesetter website but there is so many options to chose from I dont know which to chose and I dont wanna buy one that doesnt fit. If someone could take a look and tell me what ya think that would be great, im tring to get a high flow cat ASAP mine sounds like poop!!

Thanks

 

Howyadoin war... checked out that link for ya bro:

- From what I can tell, the 3.8L/5.8L max means "for engines up to 3.8 liters maximum" and "for 5.8L maximum". The 5.8L model comes in a 3" model (if you plan on NOS or annoying your neighbors) but I think the 3.8L should be the best choice for your car. As for high-flow, did you look into Random Technology? (first company to pop in my head re: cats at 4am)

 

ok but under the 3.8L section it goes to sizes, either 2 1/4" inlet & outlet or 2" inlet

 

Yea i need to know the pipe size, anyone know for a factory setup on an 89 240

 

For anyone that needs to know the factory exhaust size on a 89 is 2"