3 cats??? mine only has 2? whats wrong here?
 

Hey guys i made a mockup of what my exhaust looks like..... i thought rx-7's had 3 cats.... mine only has 2 hence the picture...

http://images.cardomain.com/member_i...78_20_full.jpg


is it possible someone before me modified the exhaust system....

i did notice 2 of the 3 bolts holding the muffler to the pipe were missing when i took the heat shield off....

-greg

Some have 2, others have 3, forget what year the change is in.

81 - some 83's had 2 I thought, and only in certain areas... The earlier models also had 2 sets of exhaust pipes instead of 1 single pipe :)

my 83 S has a precat and main cat, while my LE has just a main cat. I forget what my 83 GS has. These cars are 20 years old or more, theres a good change that the exhaust has been changed at least once.

if its stock it breaks down like this:
70-80: thermal reactor
81-83: one pre cat, pellet style main cat
84-88: 2 pre cats, and one main cat
89-95: one pre cat one main

mike

ok weird... i just replace me exhaust header today.. and took of my cat.... and i only have the main cat and no pre ones.. my car is a 84.. so i don't know. I drove my car to the other side of the city with just the header on... fucking loud as hell

i have no cat :) just a header, 2 hotdogs and a mufler

Cats? As in catalytic converters? Whats are those? ;) :D

~T.J.

Here is a mockup of my exhaust.

{Engine}[header]==

Thats it. LOL.