I have SLP Tri Y headers and they dont work at all with the World Products Straight plug heads i have now.... so i have to get a new set of heads! I know that there is also the angle plug heads, but ive seen a few sites that have said "L98 Angle" heads?! is ther TPI heads have a different angle than just angle heads??? Whats the deal?

 

L98 cast iron heads have straight plugs and L98 aluminum (Vette)
heads have angled plugs. As far as I know all angle plug heads
use the same angle on the plugs, aftermarket or not.

I think that's the answer you wanted. I got somewhat confused
in there I think. But yea, there is only one angle to the dangle.

 

Why is it that like for example if your ordering heads from AFR, you can get straight, angled, or L98 Angle heads????

 

Don't know. I haven't heard of two different plug angles before.
Might call them and ask if there are.

 

I run sportsman II's and SLP 1 3/4" headers with ACCEL shorty header plugs.