Okay so i got my hands on a option2 vid - & they said that they put b18(GSR) gutts in b16a2 engine...

I want to know::::

1) A Short Block Includes what???

2) Is the b16a1 that much differant from b16a2 other than obdI & obdII???

3) Will I gain anything from installing a b16a2 head on a b16a1?

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Im not BIG on tha ENgine ttech thing.. please help me out here..