01Blk*SS*

iTrader: (4)

hey guys, Im lookin to have a custom y made from part round/ oval tubing. My question is, who makes the best flowing Y merge? I want to do 3" inlets with a 4" outlet. I know flowmaster makes a pretty good one, but anyone else? I would really like to see the inside of the merge. anyone use the y merge from mandrel bending solutions dot com ?
thanks guys!

brian_rs/ss

i think burns exhaust has some real good merge collectors, but they are def more expensive than FM.

01Blk*SS*

iTrader: (4)

I have seen the burns, just want to know if they are worth the extra money for flow? I would like to get a stainless merge also.

brian_rs/ss

pretty sure thats what pat g used...so its proven. if u got the $$$ i'de say go for it. oh and post lots of pics and vids

brian_rs/ss

oh and what cat back you gonna do?

ss.slp.ls1

iTrader: (36)

This is the y-pipe Pat-G used on his 500rwhp 347:





This is what he had to say about it:

"Notice the dual 3" pipes merging into a 4" intermediate pipe, then a 4" cutout. After the cutout, the pipe is reduced to a 3" SLP dual dual catback. Compared to open headers with 20" extensions, my motor lost 1 hp with this y-pipe, but gained 10 rwtq in the 2500-4000 rpm range. From a sound standpoint, the rasp/drone is gone with the better y-merge collector. The difference between running with an open cutout and closed exhaust through the tail pipes is 9.5 rwhp. Not bad at all."

Engine_HP

iTrader: (1)

Nothing beats flowmaster MC for the price but i hate the size so i went with CRMB Y-pipe for both the cost and size.

01Blk*SS*

iTrader: (4)

CRMB???
No one else makes a smaller dimension merge like the burns/LG?

ss.slp.ls1

iTrader: (36)

Honestly for your mods, the flowmaster merge will be more than enough. You aren't making crazy power to justify the cost of a different merge or the necessity of a larger size merge. A simple 3" in to 3.5" out followed by a 3" or 3.5" cutout will be perfect and be efficient enough to support big hp in the future.

I personally have a custom y-pipe with a flowmaster merge 3" in/3.5" out that I got off my buddy's car that made 561rwhp with a H/C NA 402 LS2.

udienow

iTrader: (18)

I have the 3" to 3.5" flowmaster merge on my car and am very happy with it. My car is pretty stock though (bolt-ons only) and I plan to add a 3.5" cutout in the near future.