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Thunder Racing built Camaro, with their cam, tuning, Halltech's Yellow Jacket CAI, American Racing Headers naturally aspirated 11 second 1/4 mile pass. Amazing to say the least. Mark Holden driving, claims that the dyno numbers went up 34 RWHP just adding the Halltech Yellow Jacket to his Thunder Racing build. Thunder Racing is a stocking distributor for Halltech in Louisiana.