jconrad

I just found out that Random Technology makes 3.5 and 4" cats, so maybe this pipe dream will become reality...Now i just wonder how much this converter will set me back...

Camaro_nut

Well, it's good that you found someone who makes
them. I have the 3" Random Tech. cat on my Camaro.
It's $250.00! So, I bet the 4" is about $300.00! Maybe
more.

__________________
Ramjet 350 + T-56 + 3.73s =

Wish list:
LT4 HOT cam - GM aluminum fastburn heads
http://www.cardomain.com/id/91t56rs
http://www.thirdgenfbodies.com/forum...CODE=12&CID=70

BrandenCali

Wow 4" cats.. This could bring out a few questions
Im already thinking of a sweet exhaust system now.. But not a 4" catback system.. But the 4" cat could work..

Regards to the emissions comment.. What are you exactly relating this to? the diameter of the Catback or the cat itself not being designed for our cars? Remember have facts before you can qoute that Just for get..

jconrad

I think camaro_nut was talking about if I could not find the larger cat, that I may have had to run w/o one.

I am thinking about having a custom 3" y-pipe made up, that goes into either 3.5 or 4" to the cat, and then runs to my 3.5" catback. Do you think a 4" y-pipe and cat would be too much, or should I just try to stay with 3.5"?

Kevin91Z

Four cylinders flowing into twin 3" pipes? Why do you need that much y-pipe for a 350 engine? Your 1 5/8" header pipes will restrict the exhaust more than a 3" y-pipe will. What is it you're building here?

My headers are 1 3/4" SLP's flowing into custom 2.5" y-pipes into Magnaflow 2.5" cats, then into a custom 3.5" I-pipe, a 3.5" race muffler, then narrowing down to 3" into a Magaflow f-body muffler with 2.5" outlets. In my opinion, the only reason to go larger than that is if you have a larger engine, or you're running a high boost turbo or blower. But what do I know?

Lastly, you should have asked this question in a separate topic. This topic is for updating the FAQ pages and providing more info about what I said in the first post, not for asking questions. Thank you.

__________________
1991 Camaro Z28
355 RWHP, 360 RWTQ
12.803 @ 108.50 MPH (1.923 60')
Member: Southern California Thirdgenners
-=ICON Motorsports=-
Work: Manley Performance Products

jesusofthefbody

LOOK HERE FOLKS FOR THE BEST RESULTS IN ANY VEHICLE YOU ASK YOUR SELF WHAT AM I BUILDING!!!!!!!!!!!! ARE YOU BUILDING FOR STREET DRAG CIRCLE TRACK OR WHAT SO WHICH IS THE BEST. MOST HEADER COMPANIES OFFER COMPERABLE HEADERS TO APPLICATION NOT ALL ARE ALWAYS BUILT FOR BALLS TO THE WALL PERFORMANCE BUT WHAT SUITS THE APPLICATION NEEDS ARE RESEARCH YOUR APPLICATION BEFORE YOU WASTE YOUR MONEY FURTHER MORE NO CAT OUT PERFORMS OR SOUNDS BETTER THAN STRAIGHT PIPES



RESEARCH YOUR CRAP DONT LISTEN TO PEOPLES OPINIONS YOULL ONLY LOOK GAY

ShiftyCapone

You are very wrong and miss-guided. Maybe you should practice what you preach and do a little reasearch on exhaust systems and how they work.

jesusofthefbody

SHIFTY I KNOW MY ENGINES AND FURTHER MORE I KNOW MY EXHAUST ITS THE MOST IMPORTANT PART OF THE SCAVAGING PRINCIPLE IF YOU WANT TO GET SCHOOLED GIVE ME EXAMPLES WHICH INCLUDE CIRCLE TRACK AND DRAG TELL ME WHY DO CIRCLE TRACK USE A LONGER COLLECTOR AND NARROWER HEADERS THAN ON DRAG CARS WHY DO DRAG CARS RUN STRAIGHTS AND FURTHER MORE YOU SUCK

ShiftyCapone

Please don't school me, as I am not prepared for the embarrassment. Please get rid of the caps and refrain from spouting off meaningless jargon without further explanation. What are you trying to teach us?

mikey R

I bought the edelbrock kit for my 89 RS but I ordered the ones for the TPI cuz I wanted the 3"Y-pipe. I will fab up a hot air tube for the air cleaner. As for the rest of the exhaust I'm gonna use a 3" cat and a 3"system but undecided which muffler I'm gonna use. I'm NOT a fan of Flowmaster so either a dynomax muffler or a spintech. I may try Edelbrock's new SDT muffler.

Anybody use the edelbrock headers?

vortec77

Ive got the tubular exhaust nickel plated edelbrock exhaust. Im curious to what you mean by ordering the ones for tpi? I know theres the system for dual cats or single cat, but i thought all tubular exhaust sytems were all the same. Are you running the tubular exhaust system or no?

vortec77

Oh also theres the difference between one or two 02 sensors.

mikey R

the TBI system uses a smaller y pipe than the TPI system. Also the TBI system has a provision for the thermal air cleaner heat tube, the TPI system does not. I wanted the bigger y pipe so I ordered the TPI system.

vortec77

is it the tubular exhaust?

ShiftyCapone

Yes. You want to order the TPI setup so that you do not get the stock sized 2.25" y-pipe. Everything else is the same on them. ALso, all 3rd gens used a single 02 senor mounted in the driver side header/manifold.

91 camaro racer

i have a 91 305 tbi. i put edelbrock tes headers on it. came with AIR pump hookups and stove top. very nice improvment on sound and performance.

Pearl91GTA

what about mufflex spintech system?

Camaro_nut

I have it and love it. It sounds nothing like Flowmaster
and I have gotten plenty of compliments on the sound of it.
The drawbacks are the price, especially for the dual
outlet system. I don't have a good sound clip yet, but
I am working on it.

__________________
Ramjet 350 + T-56 + 3.73s =

Wish list:
LT4 HOT cam - GM aluminum fastburn heads
http://www.cardomain.com/id/91t56rs
http://www.thirdgenfbodies.com/forum...CODE=12&CID=70

Pearl91GTA

I purchased the 3.5" spintech system for my ta and love it but the price was kinda high

chevy35086

I dont know if this was said or not but the air pipes are only there and along with the pump is to pump air down into the cat to make the car warm up faster and get a little better of performance.

Kevin91Z

Once again, this thread is for posting answers to frequently asked questions about headers and exhaust systems, not for asking more questions. If you have a question that isnt answered by doing a search, then please start a new thread and ask your question.

anthony714

too much anger in these post guys.were all on the same page lets get together and no tbicker

techno101

So if I order headers through summit for a 82-92 5.7L Camaro, will I have to weld in a o2 sensor? Or do most designs for our cars alreadly have one welded in? Looking for a header for a mid 300 HP (TPI) 90-92 Camaro. Any suggestions?

I have set of Mr. Gasket headers but they have a 2.5 inch collector(inside diameter), but I'm afraid thats too small. ???????

styler

what do you all think of the cones that slide in the top of the header?
S. Tyler

ozed28

what do you guys think of the hedman long tube street hedders pn/68460 ?

superGMman

Hedman Longtubes are pretty good for the price, but I'd get the elites(model line that's just ceramic coated) as they aren't that expensive either.

If getting longtubes and you have emmissions regulations in your state(especially if they do a visual check) then you will not pass. You also have to custom fab a y-pipe for longtubes. Depending on what enging/setup you have I'd just go for hooker shorties pn. HOK-2055. Unless you are running a fairly modded 305, or a mild 350, I doubt that you would like the results that longtubes would give you.

ozed28

thanks the app would be built 355 or 383 stroker with true duels not worried about emisions cheers all

thomas1976

I like the air tubes on this headers. Anybody used them? http://www.hawksthirdgenparts.com/in...OD&ProdID=1184

Gramps

so i read through this thread and have a question and 2 comments,

Q: what is an I-pipe?, is it just a single pipe exhaust?
comments: first off, anybody who has thier cat on because they dont think that 5hp will increase thier performance is not enough