We have done 450+ on stage 2's in a obs with a Stealth and a modded H2. I would say if you did 200% nozzles on them you could get real close to 450hp with a D66. Matts truck has always hovered right around 400hp with 2's and a D66 but will beat almost every truck it races and has run 8.6 1/8th miles.
So tunes, 2's and a D66 and good hpop should put you well north of 400hp and not for a ton of money.
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