scoooby slayer

iTrader: (4)

anyone know what size standard is and what size needed for 500 hp and above ?

broddler

The standard inlet ports are 23mm at the smallest point and the exhaust are 21.3mm,a 25mm port on both the exhaust and inlet should be capable of 500 BHP, hope this is of help, try this web site if you are looking for a ported YB he used to work for Cosworth doing their heads. www.paceyports.co.uk

bigchez

I have 25/26 mm and that's apparantly good for 540 on a GT30. I just need to get a GT30 first!!

RWD Pete

Spent bloody ages doiing mine, i have 26 inlet and 25 exhaust and it seems to work, had to remove a lot of alli