mandrel bend exhuast pipe

[farmboy weldor]

does anyone know where i could possibly find 4 in mandrel bent exhaust pipe... all i can find around here is 3 in and the guys that do it say 4in mandrel benders pretty much dont exist, but ive seen 5in. "subway tunnel" diesel systems in jegs

any info will be a help

and im located in central new york

[Compchassis]

I did a 4" exhaust system and we just got mandrel U bends from a local supplier and cut and welded. You should be able to find them at possibly some diesel shops.

[Blown S-10]

http://www.mandrelbending.com/

http://shop.airflowonline.com/Merchant2/merchant.mv?Screen=CTGY&Store_Code=AFSI&Category_Code=9DSR1

[farmboy weldor]

thanx blown s10 those websites are alot of help...

and another question do you know where i could get a 2 1/4" to 4" flange to go from my y pipe?

thanks again and any other information will be a great help

[storts]

Reducer

thanx blown s10 those websites are alot of help...

and another question do you know where i could get a 2 1/4" to 4" flange to go from my y pipe?

thanks again and any other information will be a great help

I dont know if they sell one, but concentric reducers, are sold in heaveir pipe, unless you want to make one ,,,basicaly a cone out of sheet metal,,not hard, especially if you have a small hand brake,Jack

[Blown S-10]

thanx blown s10 those websites are alot of help...

and another question do you know where i could get a 2 1/4" to 4" flange to go from my y pipe?

thanks again and any other information will be a great help

no problem

are you looking for a reducer ? sounds like it. and i don't think they make em in those sizes.

what exactly are you trying to do ? pic/s = 1000 words.

[JET]

Burns Stainless has most mandrel bends that you would need. They aren't real cheap, but the quality is top notch! They also have some flanges and other things.

[farmboy weldor]

thanks but problem solved

what im really trying to do is build a custom exhust for my diesel out of 4in pipe but i checked with my engine guy and he said that 4in pipe on a non blower engine would result in power loss. he said 3in pipe would result in the largest gains and i know a muffler company who builds that stuff.

and they also build smooth y pipes... thats why i needed an adapter to go from my 2 1/4" y pipe to a 3" exhuast. now that they are doing it, it will be 3in all the way back from the headers.

im sorry i dont have pictures though.

i kind of regret having someone else do it for me. i was really looking foward to building something for the spring.

but thanks for all of the help guys!

[df5152]

what kind of diesel? turbo or non turbo charged? displacement? street vehicle or other?

[farmboy weldor]

my diesel is a 91 international IDI non turbo in a ford pickup truck

its a 444 ci
and yes its a street vehicle in fact my brother just bought a 93 version just like mine

[Blown S-10]

they make 2 1/2" to 3". maybe you could modify that. or you could cut the 2 1/4" off the y-pipe, and weld either a 2 1/2" to it, or even a 3".

the y-pipe on my truck was 2 1/2" exit. i went to a 3 1/2" exhaust. i welded a reducer cone on the 3 1/2. down to 3". then i cut off the 2 1/2 and welded a 3" piece on the y-pipe.