What Dave has said is partly true, Two Turbos yes , but one will be driven by High Pressure Nitrogen (2500psi). Gives circa 300bhp for 5 secs from a 20lb Cannister.
Ive been advertising for a Bonnet in the Wanted section, cos a fairly large Bonnet Bulge is required. Not new the system was used by Dennis Priddle years back, but scrapped because of safety concerns.

It will be used for a one-off run at Woodbridge, before i quit this scene.
Power could be circa 1200bhp & the Target is 220+.
The cannister is mounted where the passengers seat was & the second Turbo is mounted above & slightly be-hind the first.
We have a Manifold that will hopefully last the run & their will be two screamer pipes ( Brunters is out). Exhaust from the second Turbo is vented through the bonnet & is un-silenced as it only runs for 5 secs.
Pictures of the Turbos on the manifold will be posted by the weekend if a few over-sight teething probs are solved.
I must be MAD but i want to be remembered.
Rod