11-27-2006, 08:15 PM
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Senior Club Cobra Member
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Join Date: Aug 2000
Location: Mckinney,
TX
Cobra Make, Engine: Lone Star Classics #89 Keith Craft Genesis 427 so, stroked to 482, 649 hp. Sabre GT 40 #16 351W stroked to 408, 527hp, TWM stack injection, Fast XFI, G50/50.
Posts: 537
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Not Ranked
Hey Dave,
When you upgraded your sidepipes to run the spiral inserts did you start with the stock lone star pipes. The reason I ask is lone star side pipes have 1 7/8 primarys and there FE headers are 2''. That could be one bottle neck.
If quiet is not on your wish list, here is what I did.
I started with mandrel bent 2'' primarys. 4x2'' - 3 1/2" merge collector. Howe racing muffler 4'' od - 3 1/2'' id. 3 1/2'' turnout.
Loud yes, restrictive no. I am making 511hp at the rear wheels. There is a rear wheel dyno sheet in my gallery.
Good luck on you HP quest,
John
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