dp help
06-28-2010, 12:20 AM
#1
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dp help
ok so make fun of me if you want, but whats the diameter of the stock dp?
come on really? no one knows the size of stock downpipe? im tryin to order a cutout people please help asap!
come on really? no one knows the size of stock downpipe? im tryin to order a cutout people please help asap!
Last edited by corey_osu10; 06-28-2010 at 12:20 AM. Reason: Automerged Doublepost
06-28-2010, 01:43 AM
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Search bro. 
2.20" Inner diameter at the front flange off the header
2.50" Outter diameter at the flex-joint.
2.75" OD front/rear of cat.
2.40-2.45" at 02 sensor bung.
I think dats it yo. You can wait for others to be sure.
2.20" Inner diameter at the front flange off the header
2.50" Outter diameter at the flex-joint.
2.75" OD front/rear of cat.
2.40-2.45" at 02 sensor bung.
I think dats it yo. You can wait for others to be sure.
06-28-2010, 07:28 AM
#6
2.250" I.D. @ 3-bolt entrance flange
2.785" O.D. Front/rear of cat, and a portion after rear 02 sensor
2.250" dimpled portion for rear 02 sensor
2.354" O.D. neck down portion before 2-bolt exit flange
06-28-2010, 01:59 PM
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ok so if im going to cut out the section where the originaly 02 is and have the y pipe welded in there then i should order a 3 inch cutout and 3 inch y pipe and it can be welded in without an issue on the pipe since its 2.785? or should i get a 2.5 and have it flared? im not the greatest on this subject. thanks for the help guys
06-28-2010, 02:53 PM
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thanks! i really would like to buy it but someday id like to run a 3" exhaust but right now i currently dont have the cash to do so. I have the cash to buy a down pipe but don't want to buy the 3" in and 2.5" out because it would be a waste of money right? The 3" in and out would not fit now?
06-28-2010, 02:55 PM
#13
thanks! i really would like to buy it but someday id like to run a 3" exhaust but right now i currently dont have the cash to do so. I have the cash to buy a down pipe but don't want to buy the 3" in and 2.5" out because it would be a waste of money right? The 3" in and out would not fit now?
If you are still on the stock catback you will need to get the 3" downpipe with 2.5" exit.
06-28-2010, 03:11 PM
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idk if you would know this but ill ask anyway. how much do you think muffler man would charge me to run 3" pipe from my downpipe and reduce it back down to 2.5" inch right at my muffler (so i dont have to buy a new muffler).
06-28-2010, 03:20 PM
#15
I only see one prob with this. The stock lsj catback necks down to 2.25" o.d. over the rear axle and into the muffler. You could just have them replace the 2.50" portion from the downpipe exit to right before the rear axle. I don't think it would be to expensive, but then you are left with a little 2.25" rear section. You are better off waiting and getting a full 3" catback.
06-28-2010, 03:44 PM
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I only see one prob with this. The stock lsj catback necks down to 2.25" o.d. over the rear axle and into the muffler. You could just have them replace the 2.50" portion from the downpipe exit to right before the rear axle. I don't think it would be to expensive, but then you are left with a little 2.25" rear section. You are better off waiting and getting a full 3" catback.
thanks
07-08-2010, 01:11 AM
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i bent my own 3 inch cat back and used the zzp weld in 3 in dp its simple enough and wont cost much at all..... hehe mine was free because my boss bet me i couldnt get 3 inch over my axle without hitting