3" Stainless Steel Exhaust

marauderer · **Posted:** Wed Oct 18, 2006 11:52 am

I had the exhaust done just before OldNavy's GTG. It was done from just off the Turbo flange back. I maintained the CAT, Flex Pipe, and Muffler and added a polished exhaust tip. Everything is 3". The CAT is a 3" hiflow Diesel Cat and the muffler is a 3" in/out 24 " Magnaflow straight through to keep it quiet. And yes the 1000 mi. round trip to OldNavy was quiet. The system was fabricated by Todd Fisher's "Grand Muffler" in Marietta, Georgia. I can't imagine any DC dealer having a problem with this or the emissions folks either.

This is the head pipe

We used band clamps as there is no restriction and should I ever want to take it apart to realign it will be easy

The diesel Hiflow CAT doen't look any different on the outside and the silver colored paint is to prevent corrosion

3" flex and the SS magnaflow muffler. Every thing was tucked up and clearance remained the same as stock. I have a rattle can to spray on the rust and will kill it. I just need time to do it.

This was the most difficult part of the fabrication so there was plenty of clearance

And the exhaust tip.

We spaced the tip out and down a bit so the exhaust didn't discolor the paint on the bumper. As you can see I need to wash the bumper from the build up from the stock exhaust.

If any one wants to do this Todd and his crew will gladly fix you up. Lifetime guarentee.

DarbyWalters · **Posted:** Wed Oct 18, 2006 12:26 pm

Any noticeable changes in performance...turbo spool up faster...better mpg...ect...you know the drill

The only issue you might have is with inspections in some states. The stock cat has to be retained for the first 50,000 miles even if replaced...but you will probably be fine.

marauderer · **Posted:** Wed Oct 18, 2006 1:09 pm

DarbyWalters wrote:

Any noticeable changes in performance...turbo spool up faster...better mpg...ect...you know the drill

The only issue you might have is with inspections in some states. The stock cat has to be retained for the first 50,000 miles even if replaced...but you will probably be fine.

Turbo spools quicker. The stumble coming off idle and hitting WFO is much reduced. I don't think anybody will know the difference in CATs unless they had a stocker next to it. I don't even think about it. I replaced my Marauder's exhaust when it had about 3K miles on it and it included hiflow CATs. I put the whole Kook's system on it with the SS long tube headers.

usmcdoc14 · **Posted:** Wed Oct 18, 2006 4:13 pm

who did you get the cat from? price on just the cat?

I am welding up my own in 2.5" and was debating keping the stock cat or not.

marauderer · **Posted:** Wed Oct 18, 2006 6:17 pm

usmcdoc14 wrote:

who did you get the cat from? price on just the cat?

I am welding up my own in 2.5" and was debating keping the stock cat or not.

I will call and post tomorrow. The biggest restriction is just before the front of the muffler it looks like it necks down to 2.25".

usmcdoc14 · **Posted:** Wed Oct 18, 2006 9:06 pm

marauderer wrote:

usmcdoc14 wrote:

who did you get the cat from? price on just the cat?

I am welding up my own in 2.5" and was debating keping the stock cat or not.

I will call and post tomorrow. The biggest restriction is just before the front of the muffler it looks like it necks down to 2.25".

if the dealer would not get all butt-hurt about warranty issues I was going to make a new down pipe and run nothing but pipe all the way back :lol:

no cat, no muffler.....maybe a shiny tip

Ripster · **Posted:** Wed Oct 18, 2006 9:42 pm

Bear in mind this was tried on TDI's and you will not believe the noise level that
cat keeps from happening, so be prepared for a pretty good in cab noise it does
make a bit of difference.

BLake · **Posted:** Thu Oct 19, 2006 6:07 am

The factory two bolt flange, just behind the cat, necks down to about 2.25. I want to cut this choke point out of my Dynomax.

FarmDiesel · **Joined:** Thu Sep 15, 2005 8:49 am **Posts:** 132

If they ever start marketing the kit, I'd buy in a heartbeat (for a reasonable price)!

dog_party · **Posted:** Thu Oct 19, 2006 1:48 pm

Nice job! But it wouldn't pass the mustard in VA. This place is crazy about exhaust! I was thinking about buying some property in NC just so I could tag my truck down there.

BLake · **Posted:** Thu Oct 19, 2006 3:15 pm

dog_party wrote:

Nice job! But it wouldn't pass the mustard in VA. This place is crazy about exhaust! I was thinking about buying some property in NC just so I could tag my truck down there.

For noise? It has a cat and a muffler. Who is going to know the difference between stock and that exhaust. Just wondering, not trying to be a trouble maker.

On my CRD, I don't think there is 2dB difference between the stock system and my Dynomax. The turbo soaks up most of the noise. I have a Flowmaster on my Blazer that is a bit louder than stock. All the inspector has ever said is "Dang, for such an ugly truck, that thing sure runs nice" That muffler has been on there for 7 years.

marauderer · **Posted:** Thu Oct 19, 2006 3:27 pm

marauderer wrote:

usmcdoc14 wrote:

who did you get the cat from? price on just the cat?

I am welding up my own in 2.5" and was debating keping the stock cat or not.

I will call and post tomorrow. The biggest restriction is just before the front of the muffler it looks like it necks down to 2.25".

My friend does not sell CATs over the counter so to speak. To much government hassle. Sorry.

RTStabler51 · **Posted:** Thu Oct 19, 2006 4:02 pm

dog_party wrote:

Nice job! But it wouldn't pass the mustard in VA. This place is crazy about exhaust! I was thinking about buying some property in NC just so I could tag my truck down there.

Why wouldn't it? The places I've gone to for safety/emissions don't know enough to notice that kind of thing. :shrug:

BTW, what did that set you back?

dog_party · **Posted:** Thu Oct 19, 2006 4:06 pm

I didn't mean the replacement of the muffler was against the rules in VA. There are a number of replacement mufflers that are legal to use. I was really replying more to usmcdoc14's post about straight-piping it. Sorry for the confusion. :oops:

But, I have been told that replacing the stock Cat with a higher-flowing one is not legal in VA. I don't know the truth of that statement though. And, like you said, most people doing the inspection wouldn't know the difference anyway.

marauderer · **Posted:** Thu Oct 19, 2006 8:27 pm

RTStabler51 wrote:

dog_party wrote:

Nice job! But it wouldn't pass the mustard in VA. This place is crazy about exhaust! I was thinking about buying some property in NC just so I could tag my truck down there.

Why wouldn't it? The places I've gone to for safety/emissions don't know enough to notice that kind of thing. :shrug:

BTW, what did that set you back?

I don't want to post the price as most will think it is to much and I don't want to put up with all the BS about it. I will PM you if you really want to know.

BLake · **Posted:** Thu Oct 19, 2006 9:32 pm

3" diesel cat here. http://store.summitracing.com/partdetai ... toview=sku

This should get you started :lol:

usmcdoc14 · **Posted:** Thu Oct 19, 2006 11:11 pm

marauderer wrote:

My friend does not sell CATs over the counter so to speak. To much government hassle. Sorry.

ummmm ..huh?
cats are not illegal to sell unless they are used.

Dog_Party: I am also in Va (norfolk) but my vehicle is registered in MD

BUt after I do mine if you get the pipe and something in trade (I work on the barter system) I will weld it up for you

usmcdoc14 · **Posted:** Thu Oct 19, 2006 11:13 pm

BLake wrote:

3" diesel cat here. http://store.summitracing.com/partdetai ... toview=sku

This should get you started :lol:

damm, that costs like twice as much as my whole new system :lol:

RTStabler51 · **Posted:** Thu Oct 19, 2006 11:45 pm

dog_party wrote:

I didn't mean the replacement of the muffler was against the rules in VA. There are a number of replacement mufflers that are legal to use. I was really replying more to usmcdoc14's post about straight-piping it. Sorry for the confusion. :oops:

But, I have been told that replacing the stock Cat with a higher-flowing one is not legal in VA. I don't know the truth of that statement though. And, like you said, most people doing the inspection wouldn't know the difference anyway.

Yeah, its technically illegall to mess with the emissions crap, specifically cats unless the malfunction or 80k mile or more.

DocB · **Posted:** Sat Oct 21, 2006 10:07 pm

marauderer,
Nice job!
Since you did the system from the turbo back, did you get
a chance to look at (?measure?) the I.D. of the turbo exhaust
outlet? Is it a true 3" I.D. ?
It didn't seem particularly mentioned here anywhere.
Please let us know.

3" Stainless Steel Exhaust

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