Home › Cams › Comp Cams Thumpr (GM LS Thumpr) — 275THR9 (54-600-11)
Comp Cams Thumpr (GM LS Thumpr) — 275THR9 (54-600-11) cam: specs, price & owner results
| Spec | Value |
|---|---|
| Engine | Gen III/Gen IV LS |
| Style | HYDRAULIC ROLLER |
Specs for this cam are pending verification against the maker or retailer source; we will list them once checked.
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Check current price at Berryperformancesales
Tuning checklist
- Tune: Aftermarket cams need idle, fuel, spark and torque-model changes.
What owners report with this cam
Owner-reported numbers from public forum threads — exploratory, not verified. Dynos, heads, supporting mods and tunes differ; use these as a rough range, not a promise.
6reports
337median rear-wheel hp, NA (n=4; low-confidence reports excluded)
337–337range, same basis
| Engine | Heads | HP | TQ | Measured at | Adder | Confidence | Thread |
|---|---|---|---|---|---|---|---|
| Built iron-block LS2 6.0 with LS3 top end (forged crank, Scat H-beam rods, DSS-X pistons) | PRC CNC-ported LS3 | 496 | 454 | Wheel | Nitrous Express dry kit installed (not confirmed used on dyno) | High | topclassiccarsforsale.com |
| LS (GM LS327 5.3L crate) | stock GM LS327 5.3L | 414 | 405 | Crank | NA | High | sport truck (motortrend) |
| LS6 | 337 | 328 | Wheel | NA | High | bimmerforums.com | |
| LS6 | 337 | 328 | Wheel | NA | Medium | bimmerforums.com | |
| LS6 | 337 | 328 | Wheel | NA | High | bimmerforums.com | |
| LS6 | 337 | 328 | Wheel | NA | High | bimmerforums.com |
Sources
- DOD, AFM, And DFM Deletes: A Q&A With Michigan Motorsports — LSX Magazine
- Berryperformancesales — Berryperformancesales