Are big bore headers big enough ?

Guest

I have just received the shipment with "from me to me" Christmas gifts.
All of them arranged by Hall Pantera.
Looks great !! Wonder how Santa knew ?

However I am wondering about the collector size of the big bore headers.
As my new engine is a stroker ( 393 cu. inch), with alu CHI 3V heads, will the big bore headers be restrictive, and reduce the output ?
Collector is about 1,9 inch inner diameter, and the tubes are about 1,7 inch in outer diameter.

Any thoughts guys ?

Best regards
Frode
Oslo
#1155

1/5/061:23 PM

Original Post

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