On 21, Jul , at 3:22 AM, david mccandless wrote:

G, L , B, int al
the Revmaster is a fine piece, but they were engineered for VW based engines; so the biggest size available is 40mm.

******** Looks like I got this wrong; Pat's article states biggest Revflow is 44 mm-- good for about 180 hp.
Two 44s on a Pport 13b is looking good.
Thanks Pat,
Dave McC