This is a brand new set of GSC Power-Division Stage1 Turbo Cams for Toyota 3SGE/3SGTE 2.0L Engines found commonly in the Toyota MR2, Celica All Track, and other platforms. Stage 1 - This cam is perfect for mildly modded engines that have bolt-ons (intake, exhaust, etc) but retaining stock, or close to stock sized turbo. This cam would be perfect for someone that is looking to pick up more power per pound of boost. This cam behaves well on the street, and does not sacrifice any drivablility. Compatibility: These cams will work on both the Gen2 (shim over bucket) AND Gen3 (shim under bucket) heads. There is a seperate part number for the Gen3 head, and the only difference is that it comes with a 10.5mm intake lift, and a 10.2mm exhaust lift (higher lift than the gen2 cams). You can use the gen3 high lift cams in a gen2 head but it requires modification of the gen2 cylinder head for cam lobe rotating clearance. You can select which version you want at the bottom of this page. GSC Cams are known for making power at a reasonable price. If you Google "GSC Cams" you would be hard-pressed to find anyone saying something bad about them. We use them in our Race Heads and have never had a problem. If you have any questions about cams or valvetrain please do not hesitate to contact us. Sales@RealStreetPerformance.com