Thorley tri-ys perfomance

[LowBuckX]

On another site I belong to a few guys told me that tri-ys are not a good Idea that they where limited perfomance at best.
I realy like the ground clearance but I havent heard anyone speak of the performance of their tri-ys.
This is a 406 with trickflow 23* 195cc heads howards hyd roller cam. 234* intake 242* exhaust @.050 .533I .548E lift Red line should be in the 5600-5800 range

[Randy67]

It depends on what kind of tri-y headers you use. If you use the nascar style shown here:
http://cgi.ebay.com/ebaymotors/SB-2-...QQcmdZViewItem
then they should work great, but the ground clearance looks to be about the same as a traditional header. Now headers like these
http://store.cal-mustang.com/showdetl-7-3306-19-0.html
which are the ones most of us are used to, will have more ground clearance. They are supposed to help low-to-midrange power. Headers by Ed though says the 4-1 headers make more power. The nascar headers will make good power, probably more on the top end, depending on primary tube size. They definitely have done alot of testing to verify their designs. Talk to companies that build headers, like http://www.burnsstainless.com/index.htm and www.headersbyed.com for example for more.