If your engine and gearing combination requires more power or inertia to make the car launch without bogging the motor, you will want a heavier flywheel. Keep in mind, though, that a heavier flywheel will be slower to accelerate through the gears.
Ram Clutches 1550X Billet Steel Flywheel
Ram Clutches 1550X Steel Flywheel GM LS 6 Bolt 168 Tooth .400" Thicker
RAM Clutches 1515 Billet Steel Flywheel Chevy Small Block 153 Tooth External Eng
Ram Clutches 1527 Billet Steel Flywheel
Ram Clutches 1535 Billet Steel Flywheel
Ram Clutches 1521 Billet Steel Flywheel