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Old December 4th, 2009, 05:52 AM   #1
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Custom 3" Catback

As the title states this is a custom 3" catback I just finished for Stevo. The goal was for high flow with stock sound at idle and NO CABIN DROAN cruising, these were achieved. There are three mufflers total, one 3X30X8 resonator and 2 2.5X18X6 O/C all magnaflow. They are all stright thru with fiberglass packing so they flow but will also deaden the sound waves at low RPM that cause cabin droan (you guys with the Greddy know what I mean). Piping is 3" off the cat and splits to 2.5" to the rear mufflers. In order to fit the rear mufflers they had to be angled a bit so the extension off the mufflers was angled to match. The extensions are also 2.5" piping to allow for changing of the tips to any that will bolt on to 2.5" piping, in this case I threw on a set of 7.5 gen coupe tips I had laying around but S2K tips will also fit as well as many AM tips, but using the stock tips helps keep a stock look a keep from drwing popo attention unlike the 4-5" rice cannon tips on many other systems. All of the piping, flanges, mufflers, hanger rod and welds are stainless steel (as it should be but alot of custom work is not). Hangers are made from 3/8" 304 stainless steel round bar cut and heat bent to tuck the exhaust up into the chssis as close as possible without hitting.

Enjoy.....








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Old December 4th, 2009, 05:56 AM   #2
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sounds good paul!! another paul masterpeice.
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Old December 4th, 2009, 06:19 AM   #3
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How much will one of these custom catbacks run?
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Old December 4th, 2009, 07:29 AM   #4
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Awesome. Thats exactly what i wanted. I actually like the look of those tips better than the s2k oval. Im going to have to find some of those.

Looks and sounds great man, thanks for making it just how i wanted. Im ready to hear in in person.
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Old December 4th, 2009, 07:32 AM   #5
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looks great! those tips look familiar
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Old December 4th, 2009, 07:42 AM   #6
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Awesome. Thats exactly what i wanted. I actually like the look of those tips better than the s2k oval. Im going to have to find some of those.

Looks and sounds great man, thanks for making it just how i wanted. Im ready to hear in in person.
You should talk to Kschwiggy about the tips, they are his....
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Old December 4th, 2009, 09:07 AM   #7
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The exhaust note is excellent! It sounds like a comptech. good work
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Old December 4th, 2009, 11:17 AM   #8
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any plans of making a jig for this and fabbing up some for production?
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Old December 4th, 2009, 11:33 AM   #9
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^Possibly, but would need at least 5 to cover the cost of the jig, otherwise would just make them using my car as the jig. These would end up around $1250 + shipping, pretty much right between a greddy/borla($700) and a comptech ($1500) for cost
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Old December 4th, 2009, 12:08 PM   #10
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Looking good man. I'm on my phone right now so I can't hear it but I'm very excited to do so. Looks like it has that borla sound (quiet, which is what I went for) but with better flow. how's this feel on the butt dyno as compared to other exhaust systems?
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Old December 4th, 2009, 12:38 PM   #11
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1200$ damn.i did the same set up with even that y split in the exhaust same piece from jegs for 25$ had an exhaust shop run it and cost me 300$ total.1200$ ur crazy
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Old December 4th, 2009, 12:45 PM   #12
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^yea i dont understand why its 1200 bux. you can get 3 inch mandrel piping installed stainless steel for like 400 bux at a shop. add another 300 bux for the mufflers so i think price should be like 800 bux if that. But definatly good work
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Old December 4th, 2009, 12:50 PM   #13
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dyno please ^^ great work again paul. like always
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Old December 4th, 2009, 12:56 PM   #14
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. The goal was for high flow with stock sound at idle and NO CABIN DROAN cruising, these were achieved.
But how does it help the car i want performance wit out cabin drown too
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Old December 4th, 2009, 12:59 PM   #15
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1200$ damn.i did the same set up with even that y split in the exhaust same piece from jegs for 25$ had an exhaust shop run it and cost me 300$ total.1200$ ur crazy
u did a 3" exhaust that splits to 2.5?
did u use stainless steel or mild steel?
u used 3 magnaflow mufflers (1) 3 inch and (2) 2.5 inch?

300 is to cheap if ur using quality parts? or is that just the labor and the pipes?

my 3" exhaust for pipes and labor alone all stanless steel and mandrel bent was about $750 (it included the hangers and a v-band clamp and 3"-2.5" y pipe) add a high flow cat $150 add (2) mufflers $150 no tips add tips $120 add (1) 3" resonator $120 it all comes out to over $1200 dollars so for parts and his labor time its a fair price.
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Old December 4th, 2009, 12:59 PM   #16
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1200$ damn.i did the same set up with even that y split in the exhaust same piece from jegs for 25$ had an exhaust shop run it and cost me 300$ total.1200$ ur crazy
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^yea i dont understand why its 1200 bux. you can get 3 inch mandrel piping installed stainless steel for like 400 bux at a shop. add another 300 bux for the mufflers so i think price should be like 800 bux if that. But definatly good work
1)That's because you 2 live up north where stuff is a lot cheaper than where we are at.

2)The stuff isn't cheap to purchase to do these exhausts.....
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Old December 4th, 2009, 01:05 PM   #17
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1200$ damn.i did the same set up with even that y split in the exhaust same piece from jegs for 25$ had an exhaust shop run it and cost me 300$ total.1200$ ur crazy
hahaha then you get ur shop to start making 300 dollar exhausts and ull make a fortune.

put some pictures up of it if its really comparable quality to this setup
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Old December 4th, 2009, 01:20 PM   #18
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Well, the mufflers alone are $400+, these are NOT the cheap Turbo XLs that have no packing and do very little to actually reduce the sound. The piping is US milled 16GA 304L stainless not the cheap chinese 18-20GA that you normally get. The hangers are also made from 304L round bar and bent to match the mounting. Hell the front Vibrant SS flange is $25 by itself. These are built to last the life of the vehicle, provide the flow of a larger exhaust while maintianing a quiet deep tone while cruising that does not give a headache after a while (yes I am a old fart) and attract cops but will give a rich deep tone when you put your foot into the car.
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Old December 4th, 2009, 01:37 PM   #19
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That exhaust is nasty. If I had $1200 to thrown down on an exhaust system, I would do it. Nice Work! Now I'm wishing I still lived in Northern VA. Do you work at one of the performance shops up there?
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Old December 4th, 2009, 01:38 PM   #20
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Well, the mufflers alone are $400+, these are NOT the cheap Turbo XLs that have no packing and do very little to actually reduce the sound. The piping is US milled 16GA 304L stainless not the cheap chinese 18-20GA that you normally get. The hangers are also made from 304L round bar and bent to match the mounting. Hell the front Vibrant SS flange is $25 by itself. These are built to last the life of the vehicle, provide the flow of a larger exhaust while maintianing a quiet deep tone while cruising that does not give a headache after a while (yes I am a old fart) and attract cops but will give a rich deep tone when you put your foot into the car.
ahh icic. Yea i didn't realize the flanges are 25 bux. And didn't know the mufflers are over 400 bux. How much gain do u expect from this?

And also, are the stock precats only like 1.75 inch diameter?
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Old December 4th, 2009, 02:27 PM   #21
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ahh icic. Yea i didn't realize the flanges are 25 bux. And didn't know the mufflers are over 400 bux. How much gain do u expect from this?

And also, are the stock precats only like 1.75 inch diameter?
I don't expect any magical gains, about the same as a comptech.

The bottom of the stock precats are metric and are between 1.75 and 2"
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Old December 4th, 2009, 02:48 PM   #22
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Sweet. Now I can have everything refreshed, including the exhaust, when I have the Low End rebuilt on my car.



....... When I was up in NOVA having my head swap done, I learned that Paul does not use cheap $hit. He knows what quality materials to use.
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Old December 4th, 2009, 05:36 PM   #23
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Hmm nice ive seen this before...

Mine
http://www.v6performance.net/forums/...d.php?t=196600

Last edited by AccordingLO; December 4th, 2009 at 06:04 PM..
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Old December 4th, 2009, 06:50 PM   #24
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Another grea job Paul. I wonder how the results are compared to the Borla exhaust that was on his car prior.
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Old December 4th, 2009, 07:27 PM   #25
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Another grea job Paul. I wonder how the results are compared to the Borla exhaust that was on his car prior.
Lots less cabin droan....
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Old December 4th, 2009, 08:15 PM   #26
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Cool pics Paul! I'd love to hear a WOT drive by. *hint hint

This and cubanob's thread are making me have bad thoughts about the Hybrid exhaust. Quiet performance FTMFW

The only thing I'd change is the test pipe. I'd make it taper from 2.5" to 3" but I'm sure you've already got something in the works for that.
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Old December 4th, 2009, 08:25 PM   #27
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sound real good not loud at all just how i like it, any part numbers on those magnaflow mufflers??? thanks
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Old December 4th, 2009, 11:17 PM   #28
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I think parts alone was almost 1000 if you were to piece it together yourself.... check it out
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Old December 4th, 2009, 11:54 PM   #29
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$300 lol no way in hell unless your being given a gift lol. V6 exhausts out of the box or custom using the right parts won't be cheap. If your doing a single muffler setup it would save you a good chunk though.
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Old December 5th, 2009, 02:26 AM   #30
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beautiful.
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