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post #1 of 10 (permalink) Old 06-21-2006, 11:30 AM Thread Starter
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want to do it right

i've read every thread on this board....twice. Still have a few questions that i need straight answers on.

97 XR7 4.6 stock everything so far.
I want to go to true duals with bigger pipes and more sound.

questions
How big should i or can i go? 2" 21/2" or 3"?
do i cut and rebend "Y" pipe and leave cats alone, or do i get an "h" or "X" pipe with new cats?
How about the third cat/resonator?
what about the second set of O2 sensors?
Don't want the CEL to stay on, can i weld bungs onto the new pipes or hot wire/crosswire or somehow fool the sensors and EEC?
Don't want that "mustang " sound but something throatier (sp) and more cat like...
which mufflers? flomaster, magnaflo, dynomax others?

Any special problems to be aware of or look for.

Am i better off with a prebent system (summit, jeggs ect) or bending my self (have acess to 2" and 2"1/2 bender dies.

have welder and ability to do it my self, just want to avoid any issues as this car is daily transp for me and my son, and i can't afford to have it down for days or weeks chasing a problem

i'd rather go slow than not go at all

1996 MKVIII air ride delete
2007 Royal star venture (loaded)
2007 Ford free style 3.0 v-6
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post #2 of 10 (permalink) Old 06-21-2006, 12:40 PM
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On a stock 4.6L SOHC, I wouldn't go any larger than 2 1/2" pipes.

I'd ditch the entire exhaust system and start from scratch. Make new downtubes with high flow cats. Unless you're getting a chip (with which you can delete the rear O2 sensors), you'll need to weld in bungs after the cats for the rear O2 sensors.

If you want a loud, throaty exhaust, here is my recommendation:

2 1/2" downtubes with high flow cats
DIDO 18" long Magnaflow muffler with Tru-X core mounted midbody
Dual 2 1/2" pipes all the way to the rear

-Rod

Rod @ AzzKicker Cars
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90 XR7-The Meth Addict-KB SC'd 5.0L DOHC Stroker
2004 Mustang GT-The Driver-Intake/Exhaust/3.73's
1995 F150 4x4-The Mud Toy-5.0L/4R70W/33's/Warn 8274 Winch
94 LX w/Splitport 3.8L from 2000 Mustang - SOLD
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post #3 of 10 (permalink) Old 06-21-2006, 12:58 PM
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yeah i have the exact set up that rod is talking about except i have a 3.8 and even with the 3.8 it turns alot of heads and is plenty mean, on the v8 you could imagine

96 LX 3.8

Custom air intake, 9" K&N Cone, ASP underdrive pulleys, True Duals with DI/DO midmounted Magnaflow, ported upper and lower intakes, ported TB...and more to come


http://www.cardomain.com/ride/2385772

-Johnny-
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post #4 of 10 (permalink) Old 06-21-2006, 01:48 PM Thread Starter
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am i better off with 2 sepearte down tubes and a crossover with hi-flo cats or using an aftermarket pipe like bassini or other with cats already installed? do i even need a crosover?

i'd rather go slow than not go at all

1996 MKVIII air ride delete
2007 Royal star venture (loaded)
2007 Ford free style 3.0 v-6
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post #5 of 10 (permalink) Old 06-21-2006, 02:02 PM
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As far as aftermarket exhaust setups are concerned, I don't know much about them, as I've always went the custom route.

You don't need a crossover, but it wouldn't hurt. The Magnaflow muffler that I mentioned above has a X-pipe built into it.

-Rod

Rod @ AzzKicker Cars
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90 XR7-The Meth Addict-KB SC'd 5.0L DOHC Stroker
2004 Mustang GT-The Driver-Intake/Exhaust/3.73's
1995 F150 4x4-The Mud Toy-5.0L/4R70W/33's/Warn 8274 Winch
94 LX w/Splitport 3.8L from 2000 Mustang - SOLD
2 - 90 35th Anny Ed SC's
And a TON of parts cars!
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post #6 of 10 (permalink) Old 06-21-2006, 02:54 PM
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if i were you, have your exhaust guy make the entire setup separate into 2 or 3 sections, connected by slip-type flanges. reason being is when you need to drop it so you can swap driveshafts or change out your rear main, it will be easier to install your exhaust if it is in pieces. i had my exhaust made in one big piece, and it was a pita to get everything to get lined up after we dropped it. we couldnt get the hangers into the bracket above the tranny cuz the cats were hitting on the floor pan.

2014 GT
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post #7 of 10 (permalink) Old 06-21-2006, 05:45 PM
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Rod,

How is highway drone with the setup you recommended?

-Joel

Previous MN12s:
'95 Thunderbird 4.6L V8 - Performance White
Bought 01/12/08 w/ 33,000 original mi. Big plans, little execution. Sold as a fallen victim to life's happenings.
'95 Thunderbird 4.6L V8 - Performance White
Leaky shifter @ 137,441; what a good ride. Gone to the crusher, but not forgotten... moth and rust doth corrupt.

'13 Mustang GT Premium 5.0L V8, Auto, Brembo, Black - Daily Dark Horse
'11 Edge SEL AWD 3.5L V6, Loaded, Black - For the Misses
'98 F-150 XLT RegCab 8'Bed, 4.6L V8 4x4 ORP Oxford White - Work Truck

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post #8 of 10 (permalink) Old 06-21-2006, 05:59 PM
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Quote:
Originally Posted by GODSPEED
Rod,

How is highway drone with the setup you recommended?

-Joel
Joel, it's not too bad. On my DOHC XR7, with a 3" version of the setup I described and 4.10's, it's a little loud on the highway, but not bad at all IMHO. There really isn't much of a drone, just a loud exhaust note.

-Rod

Rod @ AzzKicker Cars
[email protected]
90 XR7-The Meth Addict-KB SC'd 5.0L DOHC Stroker
2004 Mustang GT-The Driver-Intake/Exhaust/3.73's
1995 F150 4x4-The Mud Toy-5.0L/4R70W/33's/Warn 8274 Winch
94 LX w/Splitport 3.8L from 2000 Mustang - SOLD
2 - 90 35th Anny Ed SC's
And a TON of parts cars!
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post #9 of 10 (permalink) Old 06-21-2006, 09:00 PM
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Can you post a pic of that 3" setup on your cat please?

1. This forum requires that you wait 30 seconds between sending private messages. Please try again in 266079416 seconds. wtf?
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post #10 of 10 (permalink) Old 06-21-2006, 11:39 PM
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Quote:
Originally Posted by jesusraybrown
Can you post a pic of that 3" setup on your cat please?
Here you go:







It necks down to 2 1/2" going through the fuel tank. Other than that, it's all 3".

-Rod

Rod @ AzzKicker Cars
[email protected]
90 XR7-The Meth Addict-KB SC'd 5.0L DOHC Stroker
2004 Mustang GT-The Driver-Intake/Exhaust/3.73's
1995 F150 4x4-The Mud Toy-5.0L/4R70W/33's/Warn 8274 Winch
94 LX w/Splitport 3.8L from 2000 Mustang - SOLD
2 - 90 35th Anny Ed SC's
And a TON of parts cars!
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