Well, if there is not enough materiel under that seat to prevent them from falling out if one chooses to for big power, welding required.
Thats not good.
Those Gabby E heads I have, under the area under the seat opened up is huge.
The SM heads need some finish work. Those tests done by their manufacturer showing they flowed a bit more than the E heads, was that intake port blended ? You would think it had to be to outflow the E head.
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