hi.need some advise.on 18g setup with 250bhp at the wheels on 18psi.was told by tuner that limiting factor in more aggresive tune is that the piston heads r the weakest link.is that true n how much more power can the pistons safely take?was recommending changing to forged mahle pistons n further engine work.
futhermore,wld changing to unequal length headers liberate additional ponies n a retune required?how much additional power to expect from headers if any, n wld b this power b at low/mid or high end?
futhermore,wld changing to unequal length headers liberate additional ponies n a retune required?how much additional power to expect from headers if any, n wld b this power b at low/mid or high end?