Track and drag racing turbocharged cams, ÿ1200hp+ SR16VE/SR20VE engines. Suits 72mm+ turbo. Great with alcohol based fuels. Large off-VVL lobes for improved mid-range power, VVL lobes will pull to 10k+ rpm. Kelford Cams recommend KVS10-BT valve spring kit. Primary lobe spec: Intake: 260ø/10.2mm | Exhaust: 260ø/10.15mm