silversrtman

iTrader: (20)

I have heard a few people say that the BBK y pipe is the same diameter as some catbacks. Has anyone installed these with a Magnaflow catback? Any mods need to be done? I searched for pages but couldnt find anything. Thanks.

99Bluz28

iTrader: (35)

Nothing a exhaust shop pipe expander can't fix in less than 1 second.

Cstone812

iTrader: (5)

I dunno about magnaflow but I had slp lm1 and installed the bbk longtubes and y pipe and the y pipe was just a tad bit bigger than the inlet to the catback so i was able to squeeze it over the inlet and i had it tach welded

DOG-TWO

im getting ready to hook my BBK ory to my magnaflow cat back and havent thought about that problem but id get a like 3 inch long clamp and that might work.

99Bluz28

iTrader: (35)

The exit on the bbk y-pipe(inside dia.) is sized to slip over the factory I-pipe(2.9" OD) with just little bit of wiggle room(about 1/16"). IMO, buy a cheap $4 micrometer to measure the OD of the I-pipe for your cat-back and the ID of the bbk Y-pipe merger exit. If the OD of the I-pipe for your chosen cat-back is over 3" then one of the pipes will probably need to be slightly expanded to slip fit.

silversrtman

iTrader: (20)

is that actually an issue? are they the same size, and if so do they meet or do you have to cut the y pipe?

99Bluz28

iTrader: (35)

It all depends on the tube thickness of the I-pipe, and if the manufacture goes by the ID or OD, and if they have reduced the pipe diameter to fit the factory y-pipe.

Like I said before it's a very simple fix on a exhaust shop pipe expander; if needed.

dr_whigham

iTrader: (49)

Either go to a shop, or go to Harbor Freight (or comparable store) and get a cheap pipe expander. The uses are almost endless.....

99Bluz28

iTrader: (35)

FYI, unless you have high torque (+150 ft.lb.) impact wrench that cheap pipe expander might not do anything at all, and that's if you don't break it in the process of trying. I striped the threads off of two and broke one trying before.

dr_whigham

iTrader: (49)

Jeez.... Scratch that then. Thanks for the heads up. It worked for me and an HKS Stainless around 5 years ago. Well, then again, that was when stuff still said Made in USA.... Looks like I won't be buying a new one since I've since lost that one in the move.

I-Pipe to the shop it is then.

silversrtman

iTrader: (20)

Bump anyone else with this setup?

inssanity21

iTrader: (16)

i have the bbks going into a magnaflow. since the magnoflow was on the car prior to the longtubes it required some heating and pounding onto the y. maybe an extra 5 minutes of work but it was due to it being clamped down before. if its a new system then it should have no issues going on.

silversrtman

iTrader: (20)

I take it im the only one whos magnaflow i pipe was too short to reach the y with this setup? After a ton of annoying work trying to get pipe to fit into the y, we put the y pipe on the car and went to put the i pipe on and they barely touched eachother. I mean I guess we should have test fit everything before we did all that work, but technically we shouldnt have had to. I bought both the headers and y and the magnaflow systems brand new. And the magnaflow fit perfect with my pacesetter y pipe.

Grifter

iTrader: (12)

You should never use an impact gun on a pipe expander. A 1/2" breaker bar is all you need.

99Bluz28

iTrader: (35)

Put a band clamp on it and take it to a local exhaust shop, they can weld in a 6-8" piece of 3" tubing and your good to go.

I didn't have that problem , but I don't have a cat-back.

99Bluz28

iTrader: (35)

When I tried that it didn't work.
The one I broke was with a 3/4" breaker bar, the other two (striped) were with a impact gun.

Grifter

iTrader: (12)

After the third try we broke the Harbor Freight expander with a 1/2" breaker bar. If we had used an impact it would have exploded on the first try hah. Any sort of puller or expander you should use hand tools. When you say it didn't work do you mean you couldn't get enough leverage on it to expand the pipe? We had no problem expanding it before it broke, my breaker bar is about 24" though.

silversrtman

iTrader: (20)

I ordered a piece of 3" stainless exhaust pipe and one of these clamps



I am going to weld an extension onto my existing magnaflow i pipe and butt the pipes up even with one another. That clamp is supposed to seal pretty well apparently.

99Bluz28

iTrader: (35)

I'd have the tubing slightly expanded on one end so you can slip fit it over the Y-pipe merger exit, you'll get a better fit and minimize your chances of having an exhaust leak.