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Forum: Pontiac - Street 10-14-2021, 06:37 PM
Replies: 40
Views: 3,468
Posted By NeighborsComplaint
Since it's October I'd wait for a Black Friday...

Since it's October I'd wait for a Black Friday deal on the Speedmaster heads and go with the appropriate piston dish. This assumes they discount them. You'll put that much $ in the 6X heads anyway
Forum: Pontiac - Street 10-14-2021, 12:04 PM
Replies: 40
Views: 3,468
Posted By NeighborsComplaint
On a 400 the 6x4 would be preferred just based on...

On a 400 the 6x4 would be preferred just based on compression ratio. There really is no significant flow advantage to any of those low compression Dport heads, just chamber size differences. The 6x...
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