- performance parts
- Grand Prix
High quality, very well constructed. They're perfect for my 590 hp grand prix. I purchase all my performance parts from zzp. Great company.
Get ready to grind away.
If you install these be sure you are ready to grind the manifold/headers. I have Pacesetter headers and the rear cleared (I think) by the thickness of a sheet of paper. The front aren’t even close! I have to grind 3 different spots. Wish I would have stuck to tty bolts. On a side note the studs and nuts are heavy duty!
Arp head studs
I received my package last Thursday and went to install my arp head studs. Well after getting one head installed and prepping the 2nd to be installed I noticed they sent me 10 long studs and 6 short. Ive been patiently waiting to get my issue resolved so my car can see the road again. But after emailing them , all they asked for was pictures of what I received. Which is kind of hard when my car is half put back together. I sent them a photo of the 2 long studs I am unable to use. Still waiting for something to happen to get this resolved. Very disappointed. Usually my experience with zzp is a lot better than this. But as for the studs them selves they look great.
Quality but lack of due diligence
Parts arrived as expected, quality was all there from arp, but i wish ZZP and put in the item description that, with these studs you also have to do quite a bit of modification to the rear exhaust manifold to get all the manifold bolts/studs in. ones between the valves fit perfect.
ARP Head Studs
(Returning customer) Top quality parts, easily ordered, promptly sent & received.