Hi guys;

I just got the Gt2871r turbo from Twist Motion. This turbo is design for the Nissan S13. Which exhaust manifold is your recommend (top mount or low mount). Also, which brand ? If I go with top mount, so do I have to relocate the inlet?

the nature of your questions say u need more research, and/or link up with an experienced turbo person
There r enough 300hp turbo 4AGE build detailed.... or numerous 1.6L miata builds
Alot of 1.6 & 1.8 miatas claim those "chinese 2871" suck on their motors. Hope that turbo somehow works out 4 u
poor choice for a 1.6L 300hp.
See if you can find a small diameter short runner steam pipe manifold (maybe custon built?)..... will optimize spoolup
Those 4AGE big runner, thin wall, long tube junk u often see offered, will only make matters worst and heat up underhood unnessicarily

CX Racing top mount T25 flanged cast manifold probably suit your needs, if they still make it