I had a pretty bad rasp with the manifolds and after seeing countless longtube installs on ls1tech ending with unbearable rasp I was planning for the worst. well Im surprised and glade its gone guess my merge I made worked very well

 

So what is your whole set up now? I have LT's, a custom merge, and magnaflow. The ypipe flows about as smooth as you can get, and the merge is a flowmaster 2.5-3. So it should be pretty decent too. But I still get more rasp than I like. Was thinking about fighting it with some high flow cats someday.

J.

 

why not use a short bullet muffler in the I-pipe?

 

No raspiness with either of mine.

 

Manifolds...i have a pile of those, never used them. Rasp wise, my RS has 1 chambers, so you can imagine it is load, but it is deep, but the 86 TA with the 3 inch into a 3 inch Y with shortys has the bullet muffler and only really has raspieness at a given rpm slightly accelerating:

http://www.youtube.com/watch?v=QrMMhDP1EJY

 

its the hawks knock off long tubes and then its 3" SS mandrel bends to make up my y-pipe and I made my own merge and then the rest is the old slp catback 2 on the left

the only real difference is I went from the cast manifolds and changed the way I had the two pipes merge.

 

Define rasp?
I dig the sound my car has with the manifolds, 2 1/2" Ypipe, flowmaster merge into SLP 2OTL catback.

 

http://s70.photobucket.com/albums/i9...t=MOV03321.mp4

http://ls1tech.com/forums/generation...vids-pics.html