Thanks Patrick G Nice Gain with Flowmaster Merger Y Pipe.
Thats kinda what I did, except I do not have a cutout yet, but will soon.
I had that same exact ORY in pic 1.... I hated how it sounded... mad rasp and a hammering noise from 2000-2500 RPM. So I bought a flowmaster merge, and had that installed. Now car sounds better, tho still a bit of rasp... The merge I got though was a 3" to 3.5"... not 4" like the OP did. Maybe rasp would be gone if I had went with the bigger merge. Nonetheless it was worth every penny and I would suggest to anyone to go with this merge.
On a side note, where do u get a stainless cutout like that but in 3.5"? Price?
I had that same exact ORY in pic 1.... I hated how it sounded... mad rasp and a hammering noise from 2000-2500 RPM. So I bought a flowmaster merge, and had that installed. Now car sounds better, tho still a bit of rasp... The merge I got though was a 3" to 3.5"... not 4" like the OP did. Maybe rasp would be gone if I had went with the bigger merge. Nonetheless it was worth every penny and I would suggest to anyone to go with this merge.
On a side note, where do u get a stainless cutout like that but in 3.5"? Price?
I dont understand why header companies dont bother to put in a decent merge for their ypipes. Theyre missing out on half the gains
Is that first pic a pacesetter ORY? And is that the same y-pipe modifed in the next pic? I need to change things up on my setup, which is PS LT's, PS ORY, and LM1. I'm thinking the merge and a bullet muffler might be enough to have a little bit tolerable setup.
Exactly. Check out the link in my sig on the 4" PaceSetter Y. Hacking out the pacesetter merge and puting in a flowmaster merge made for a huge sound improvement. There was a noticeable drop in bottom end, but a huge difference on the top.
I bet that Y pipe above with the dump sounds badass.
I bet that Y pipe above with the dump sounds badass.
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Thread Starter
Joined: May 2005
Posts: 1,410
Likes: 11
From: Port St. Lucie, Fl
Remember very important not any y merger will give u the desired results. You want a 3 inch dual merger goin into a 4 inch intermediate pipe then back into a 3 inch exhaust, like patrick states anything smaller than 4 inch will not get desired results. My exhaust tone changed. No more drone and picked up about 10 rwtrq from 2500-4000 rpms.
But to be honest why go thru all the trouble and do what i said above, when you can make custom 3" Y using the Flowmaster merge for less? That is what i did...
Thread Starter
Joined: May 2005
Posts: 1,410
Likes: 11
From: Port St. Lucie, Fl
What is the part # for the FM merge? I can't find it on Summit's website
NO The correct part number is Flo- Y300400 Again u want to use a dual 3 inch go into a 4inch. I could be a cutout or exhaust system. Mine is a LM Exhaust.
Example: I run pacesetter LT. I bought TSP Catted Y. I had the muffler shop cut where both y pipes come together and make a dual 3inch as u see in patricks photo exactly like that. Weld the FM on your y pipe then use a cutout or in my case an exhaust system.
NO The correct part number is Flo- Y300400 Again u want to use a dual 3 inch go into a 4inch. I could be a cutout or exhaust system. Mine is a LM Exhaust.
Example: I run pacesetter LT. I bought TSP Catted Y. I had the muffler shop cut where both y pipes come together and make a dual 3inch as u see in patricks photo exactly like that. Weld the FM on your y pipe then use a cutout or in my case an exhaust system.
What is the part # for the FM merge? I can't find it on Summit's website
NO The correct part number is Flo- Y300400 Again u want to use a dual 3 inch go into a 4inch. I could be a cutout or exhaust system. Mine is a LM Exhaust.
Example: I run pacesetter LT. I bought TSP Catted Y. I had the muffler shop cut where both y pipes come together and make a dual 3inch as u see in patricks photo exactly like that. Weld the FM on your y pipe then use a cutout or in my case an exhaust system.
NO The correct part number is Flo- Y300400 Again u want to use a dual 3 inch go into a 4inch. I could be a cutout or exhaust system. Mine is a LM Exhaust.
Example: I run pacesetter LT. I bought TSP Catted Y. I had the muffler shop cut where both y pipes come together and make a dual 3inch as u see in patricks photo exactly like that. Weld the FM on your y pipe then use a cutout or in my case an exhaust system.
Thread Starter
Joined: May 2005
Posts: 1,410
Likes: 11
From: Port St. Lucie, Fl
This is a quote from Pat G 500 rwhp Recipe. You can do what U want but I followed what He had said Mine is 3inch running into a 4 inch back to 3 inch. Now it has great flow. Anything smaller than smaller you run risk of flow loss.
Merging the twin pipes coming off the headers is a critical item for power and sound quality. Vettes have it easy because an x-pipe easily fits and the sound quality is awesome. F-bodies are handicapped because of space constraints. For 500 rwhp, you want to run dual 3" pipes after the headers and you'll want them to merge into a 4" intermediate pipe. Anything smaller will run the risk of flow loss. Most y-pipes on the market slam the 2 pipes together like this:
This is a quote from Pat G 500 rwhp Recipe. You can do what U want but I followed what He had said Mine is 3inch running into a 4 inch back to 3 inch. Now it has great flow. Anything smaller than smaller you run risk of flow loss.
This is a quote from Pat G 500 rwhp Recipe. You can do what U want but I followed what He had said Mine is 3inch running into a 4 inch back to 3 inch. Now it has great flow. Anything smaller than smaller you run risk of flow loss.