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620 Seats


Trod8812

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What L engine does your brother have??? L20B head on L16 = low compression.

 

There are two L20B heads U67 '75-'77 with square ports and exhaust heated intake or W58  '78-'80 and  round exhaust ports and coolant warmed intake.

 

 

 

 

Changed the title so the search function will find it for 620 owners looking for seats 

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Any of the performance parts available will fit either head.

 

A better question would be what head does he currently have?

 

The result of anything added to any of the heads is minimal.

Upgrading one versus the other has little effect.

 

 

Depending on pistons and exhaust manifold should determine which head to go after.

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