5e head on 4efte

[20v_rollaboy]

How will this help/improve my engine?

Is it a straight bolt off bolt on job or do other things have to be changed?

And will this increase engine capacity?

Thanks

[loose_unit]

No, the heads are the same, so it wont help. The pistons are different in the 5E which is what adds the extra compression. 4e-fte 8.2:1, 5e-fe 9.4:1, 5e-fhe 9.8:1.

A 5e-fe with 4e-fte pistons would net a 1500 with compression in the high 8's, although theres no reason why you cant turbo a stock 5e if its tuned right.