hotrodney
Thanks Luke they look great, will follow up.
Steven, Ashley pipes look alot more pricey than 105 type.
Woz, Cortina will be mostly race car so the higher rev range will be more of a common occurance. Hence 4 into 1.
Thanks for your input guys, much appreciated
Cheers, Dan
Dan,
Depending on how big your cams are, the work on the rest of the engine and what sort of racing you plan on doing with it I would still consider 4-2-1's done properly. When I referenced to the Ashley pipes earlier, the sets I have seen for an N/A Cossy had less than ideal angles on the runners, and for $750 puts you almost into the custom made pricing. Unless the design has changed, even at $500 as Geoff stated, I would look at something else for your intentions (no offence meant Geoff), I just don't think they're up to what you want.
Cheers
Woz