MANUFACTURER: TOMEI POWERED
ENGINE MODEL: 4G63 EVO 8
CAMSHAFT PN# (INTAKE): 1454290115
CAMSHAFT PN# (EXHAUST):1455290115
SPEC CARD# : GSC-6008S3

INFO

Hands down, these camshafts made the most power. Not only did the TOMEI 290s eclipse the 600-wheel horsepower mark, they completely destroyed it. With a power increase to just under 610 wheel horsepower, this gain in power translates to a near 35 percent increase over the factory numbers. Out of the 17 grinds we tested, this set of highest-duration camshafts introduced the most lope in the idle. From 5,000 to 8,500 RPM, the TOMEI 290s delivered enormous amounts of power as the RPMs continued to rise. Compared to the TOMEI 280s, these 290s trade low-tomidrange power below 5,000 RPM for peak power just prior to redline. TOMEI 290s required upgraded valve springs.

RUNDOWN

608.20 WHP @ 8,400 RPM
419.42 LB-FT @ 7,000 RPM

Peak power checked in at 8,400 RPM, with the power curve remaining flat all the way to redline. Peak boost was reached at about 4,600 RPM. A flat torque band from 5,000 to 8,000 RPM delivered a peak torque figure of just over 415 lb-ft. Peak torque was achieved at 6,600 RPM. The highest VE values were recorded between 6,000 and 6,500 RPM. VE figures registered higher than the factory units from 4,000 RPM to the top.