Hey guys, i may potentially be buying some Gen II cattman headers/y and eas wondering what the differences are between the different productions. I know gen I is the most "crude", with no scrape plate on the bottom of the y pipe if i recall correctly. Besides that im clueless.

Anyone able to list the differences between the generations, or know a thread that has a list? Ive tried about a dozen different phrases in the searchbar and had no luck.

 

As far as I know there is no crazy difference

 

With some further reading, i found the gen 1 setup is not a 'true' equal length pipe - the loop on the Y is more round thus shorter than the gen 2's and up. I thought i read there was slight differences with the O2 bung placements but im not able to find any solid info here.

Another noob question but are the gaskets for the headers -> ypipe nissan gaskets or cattman made and specific to his design? I know his headers line up only with his ypipe so i am curious if he designed the flanges identical to the oem nissan or if they are unique.

 

OEM gaskets are utilized at all points of connection.

 

1st gen are 4 piece, 2nd gen and 3rd are 3 piece. Nothing major in general design though.


Here are my 1st gens:


[IMG][/IMG]

2nd Gens:




A good read:
http://forums.maxima.org/all-motor/3...n-95-03-a.html

 

What is the exhaust note or sound difference with the cattman headers?

 

Depends on the cat back.