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Brian Tooley Racing 400+ Small Twin Turbo cam: specs, price & owner results

Tune: Aftermarket cams need idle, fuel, spark and torque-model changes.
Idle: Aggressive
Cam gear: Three bolt

237/25X .619"/.619" 117 LSA

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Spec	Value
Part number	BTR-STT400+
Engine	Gen III/Gen IV LS
Application	TWIN TURBOCHARGED
Style	HYDRAULIC ROLLER
Cam bolt	THREE BOLT
Duration @ .050 (int/exh)	237 / 25X
Lift (int/exh)	.619 / .619
LSA	117.0
Idle	aggressive
Displacement range	388–427 ci
Turbo/boost	twin 66-76 mm setups or up to a single 94mm turbo
Price	$409.99 (Brian Tooley Racing, 2026-09-29)

Tuning checklist

From the cam maker's description and our cam tuning guide. Confirm with your tuner. What else does the tune need? →

Sources