Hey all, how goes it?
I've wondered about this for some time now.
So many people get the catback systems and some get
headers too. But a large majority of them keep stuffing it
down that damn Y pipe. I just can't see duals as coming
from a single pipe. Can't justify headers going to a single pipe.
Mildly irritates me every time I'm under the car and see that
mushed driver side pipe too.
Is it just the clearance that prevents most people from putting
in Actual duals? Admittedly I haven't had time to actually measure
or give it the eye with the thought of pulling it all out and replacing it.
If it makes a difference in 4th gen bodies, I have the '99 TA.
Bait for spammers:
Remove "spamless" to email me.
Mostly it comes from the EPA. Most exhaust shops will not bend you
duals, or even sell you a dual in dual out converter.
I have had a 3rd gen with true duals. Both pipes (2 inch) followed the
orginal routing. The Y pipe had been cut before the merge, and welded to two
seperate pipes. The car had glass packs where the converter should have
I removed this set up, and went with a custom 3 inch set up. Including
a Custom 3 inch Y pipe, 3 inch in, 3 inch out converter. The car did not
slow down any. It did improve mid range torque, while dropping low end
torque by a hair.
I was at a exhuast shop a few years back. Talking with the owner about
making a set of duals, sans cats, for a off road late model truck we had.
The truck never went on highway, unless it was on a trailer.
The owner told me the EPA rules prevented him from doing such for me.
This is a place that I have dealt with for close to 10 years now. First I
had heard of it my self. It may be the OHIO EPA, since most ohio countys
have emmissions testing. As well as the state has an Anti-tampering law.
Fact is with high flow cats, your vehicle will NOT lose performance AND stay
With that being said, most shops don't want to mess around with that stuff and
what's "exempt" and what's "not exempt". For them, if it came with a cat, it
gets one when it's repaired.
Joe--ASE Certified Parts Specialist & 10th Ann.Club Tech Director
'80 Carousel Red Turbo T/A, 26k orig.
'79 "Y89" 400/4 speed 10th Ann. T/A, 57k orig
'84 Olds 88 Royale Bgm 2 dr, 307 "Rocket" (lol), 141k and still going....
'80 T/A project car...
i had a 197 camaro iroc-z with a 355 tpi. i had duels with headers on
it. i just had 2 1/2 inch ran with glasspacks and turndowns before the
rear wheels, and no cats. i live in michigan and there is laws against
it but it is not checked like it is in some states. and it ran great
13's in the 1/4. but my 1987 with a 355 has headers with a 3 inch pipe
into a flowmaster and duel 2 1/2 tail pipes out with no cat and
sounds alot better.
HORSEPOWER IS CHEAPER THEN THERAPY!
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