| With great performance and availability, the GM LS (LS1, -2, -6, -7) engines are an increasingly popular choice for retro-fit street rod
and muscle car applications. In stock form, these engines are decent performers but they have much more to offer. And now with the
Thumpr™ GM LS Cams you can have all the efficiencies delivered by this modern engine platform with a head turning “old school” hot
rod sound and serious performance to back it up. The new Thumpr™ GM LS Cams are compatible with both carbureted and re-tuned
electronic fuel injection (EFI) engines and do not sacrifice anything in durability or street manners.
* In EFI applications, computer tuning is required.
- Designed for EFI (tuning required) & carbureted 1997-2008
GM LS (LS1, -2, -6, -7) engines; excellent street manners
- Early intake valve opening and long exhaust duration create
optimum overlap for a powerful, hard-hitting exhaust sound
Int. 219 Ext. 233 Lift Int. .553 Exh. .536 LSA 109°
Made specifically for LS1, -2, -6, -7) Engines | 
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