BTR Red Hot Camshaft — Gen III/IV LS
221/24X, .619/.617, 113 LSA
SKU code: BTR-REDHOT
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Camshaft Specifications
| Spec | Value |
|---|---|
| Duration @ 0.050" (intake) | 221° |
| Duration @ 0.050" (exhaust) | 24X° (BTR proprietary — not published) |
| Gross intake lift | 0.619" |
| Gross exhaust lift | 0.617" |
| Lobe separation angle (LSA) | 113° |
| Intake lobe lift @ TDC | 0.04730" |
| Cam style | Hydraulic roller |
| Cam bolt pattern | Three-bolt |
| Install method | Dot-to-dot |
| Application | Gen III/IV LS — 5.7L, 6.0L, 6.2L |
About the BTR Red Hot
BTR's Red Hot is their newest LS cam and it punches above its spec sheet. In back-to-back dyno testing it outmade BTR's own Stage 2 PDS and LS3 Centrifugal profiles with less intake duration — which tells you BTR's in-house lobe designs are doing real work here. It's built for 5.7L, 6.0L, and 6.2L LS engines (Gen III and IV) and has been validated in both naturally aspirated and boosted applications.
The 113° LSA sits tighter than a Stage 3 but wider than a full race grind — that's the sweet spot for a street-driven car that makes serious power. Idle is aggressive. Not grocery-getter aggressive. Expect a lope. If that bothers you, go Stage 2.
For high-compression or boosted builds, BTR recommends E85 fuel. IMS runs these on the dyno regularly — call us before you buy if your combo is at the edge.
Australian Fitment
The Red Hot fits all Gen III/IV LS applications. In the Australian market that covers:
- VE/VF Commodore — L98 (6.0L), LS3 (6.2L)
- HSV — ClubSport, GTS, Maloo (LS3 6.2L)
- VT–VZ Commodore — LS1 (5.7L) and LS2 (6.0L)
- Holden Ute / Crewman — LS1, LS2
- Pontiac/GTO/G8 — LS2, LS3
- LS-swapped builds — BA/BF/FG Falcon, VL/VK, anything running a Gen III/IV block
Standard LS valvetrain hardware applies. IMS can spec valve springs, pushrods, and rockers to match — ask when ordering or call us for a full kit quote.
Where the Red Hot Sits in the BTR Lineup
| Cam | Int. Duration | Lift (int/exh) | LSA | Best for |
|---|---|---|---|---|
| Stage 2 LS3 | 218° | .600"/.600" | 114° | Street NA, mild build |
| Red Hot | 221° | .619"/.617" | 113° | NA and boosted, aggressive street |
| Stage 3 LS3 | 228° | .624"/.624" | 112° | Track-oriented, higher RPM |
Note: specs shown are representative — exact figures vary by variant. Talk to IMS before committing to a cam for a boosted or high-compression build.
Dyno and Build Videos
Not sure if the Red Hot is right for your build?
IMS installs and dyno-tunes BTR cams in-house. Call us before you order if your build is boosted, high-compression, or if you're not sure which cam suits. We'd rather spec it right the first time.
| SKU | BTR-REDHOT |
| Brand | BTR |
