The RGS had a 2:1 pipe and that went very well.
I’d also suggest that 2:2 with 2 Goldie cans would also perform very well. That’s Degens favourite set up for fast road Tritons etc.
You just gotta make sure that they have the proper Goldie internal design.
The two in one didn't seem to hurt or help my SR.
I should have run it up dyno hill before and after, not sure how I forgot to do that!
There is a certain amount of mythical performance given to the RGS .I think this might be down to its relative rarity and cost.
If it costs that much more it must have been really, really fast, right?
In reality the RGS has a bit less acceleration than my old SR.
The BSA built RGS ( most RGS) just used a late model SR engine, west coast USA style at 9 to 1 cr.
It did get the Goldie gears with the super high first, so 0-60 would happen a lot sooner on the SR.
The Eddie Dow Goldstars were a bit different but I expect similar in performance.
I have a factory memo that claims a fair bit of additional power with the Siamese setup on an A10.
I was hopeful, but the power gain was as elusive as the claimed 11 second quarter mile with the Dunstall pipes on the 850.
The memo also suggests using muffler cement to hold the short pipe in. I tried that but it still blew out on the road.
Glen