4g91 cannot fit the gsr piston cos 4g91 piston size is 77mm, and gsr is 81mm. but 4g92 can fit in only the gsr piston cos both also 81mm...
---------- Post added at 05:10 PM ---------- 6 hour anti-bump limit - Previous post was at 05:04 PM ----------
gti piston not gsr sorry...but is very good upgrade for those 4g92, 4g93 block...cos only gti piston in the range of 4g93 series is the highest compression,compare to some of them change the 4g93 sohc block or local 4g93 block...