it is fairly easy to get 375bhp from this engine, mine is 4.8litre (forged pistons take it from 4.6 to 4.8) with different injectors and camshaft etc mine is 287bhp. If you change the heads to merlin heads that gives you an instant 100bhp without doing anything else. the design of the original heads are what holds the engine back in terms of horse power.
The biggest improvement is the increase in torque mine has over 300 lbs/ft
David Byrne. 1985 +8
