Have a turbo setup done but wondering if there are any kind of aftermarket internals to go with what company where do i go to order these. pistons? cams?

 

there's virtually TONS of info for this...hate to say it but please do a search for some of this stuff.

what fits right for you depends on your budget and how fast you want to go.

can you tell us what your turbo set up look like and what power are you looking to get with the set up? any pics?
what budget are you looking at?
what is the car used for? track, daily drive?

 

Anything can be custom machined. As already suggested, there's a lot of info out there if you just hit the searches. My only one recommendation ... stay away from JWT cams or otherwise buy them 2nd hand if you can so you can save some bucks. They are not brand new from fresh billets as JWT would have you believe and I've got this testimony from my friend who has a masters degree in mechanical engineering and over 30 years of experience. You might find it hard to believe but he was the pit crew chief for the Kmart Indy car team, so I take what he says very seriously.

When I got my JWT cams, I found the lobes had surface rust with a blue coating over them as though they were trying to pull the same stunt as potatoes in pink plastic bags. A fresh billet would not show anything of the sort if they're already treated and coated. In short, you're paying a lot of money for what are regrinds.

Better yet, if I search hard enough, I think I still have the paperwork from a camshaft specialist who spec'ed them up. You can take those specs along with your cams and have them reground to that spec ... the one that JWT refuse to disclose to their customers. I remember asking them repeatedly what the specs were so that I could fine tune my MoTeC's injection timing and the twit there kept telling me that the timing varied depending on RPMs. Guess what? The timing can't vary in a single overhead cam irrespective of the engine speed!

Now if that's the kind of intelligence (no, make that bullsh#t) you get from a supposedly highly regarded performance shop, then you know already to steer clear from that mob. Before anyone from JWT dares to jump at me about defamation, I still have the emails from a certain B.P. back in 2004 who passed this rubbish information on to me. Don't even bother wasting your time with me, given I wasted my money on you.

 

search for Z31 internals. same engine for the most part. any of the internals from a Z31 will work in a VG Maxima.