What are the latest thoughts on exhaust tube diameters and lengths for a 240-250bhp K series? Engine will be a 1.9 with ported VVC head, larger valves, 1721/1444 cams, 42mm Jenveys.
I have an SLR 4-2-1 exhaust at the moment which has 1.75" primaries, 2" secondaries and a 2.25" collector.
Although achieving good power and torque are the primary requirements, it must be quiet so the silencer needs to be a decent length which may compromise the primary/secondary length.
Most of the big power Ks seem to use the R500 4-1 or similar - is this the best route?
Yellow SL #32 - member of Drowned Rat Racing