HR motors aren't drastically different, Pro's gains would be similar if they were on a VHR motor. It may be argued the HR motors can be tuned better because of better control of the cams.
On that note, it took a heck of a lot to make 140whp/70lbft over bolt on mods.
Meth on a GTM stage II kit is a 543whp and 405lbft/tq. (Staples)
Baer383 is using GTM's 1.5 kit and no meth.
GTM's stage 1 SC kit pushed 460whp which is similar to a Full bolt on Stillen kit on high octane.
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Old Car:GTM TSC'd 550whp / 410lbft tq @ 11.88PSI
New Car: Under Construction
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