Belt Tensioner, w/Idler GM LS Passenger (54021)
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Compatibility
- Platform
- LS/LT
- Vehicle-specific fitment
- Review application details below
- Need help?
- Confirm fitment with us before ordering — (714) 202-7886
We list the engine platform a part is built for. That is not year-and-trim application data, so it does not confirm a fit on your specific vehicle.
- Est. install labor: 4.0 hrs — $500 at $125/hr. Pick Install at HRC and a 20% labor deposit ($100) is due at checkout; the balance is due at completion.
- An estimate for a stock vehicle, not a quote — we confirm it in writing when you book, before any labor is authorized. Seized hardware, prior modifications, diagnosis and machine work are quoted separately; tuning is arranged through our tuning partner. Questions: (714) 202-7886.
- Warranty & track disclaimer — read before you race it.
- Shipping & returns — rates and RMA terms.
- Installed in-house in Huntington Beach, CA — labor & service policy.
- Affirm and PayPal available at checkout.
More ways to pay at checkout
The GM LS engines with the factory spring loaded belt tensioners become prone to throwing belts when used in performance Applications and with aftermarket balancers. These bolt-on Billet LS Belt Tensioners are a fully adjustable solution for controlling potentially damaging resonance and maintaining desired belt tension.
- If used with 2010+ Camaros, the belt must be changed.
| Part Type | Accessory Drive Belt Tensioner Assembly |
|---|---|
| C.A.R.B. Exemption Reason | No impact on pollution output of vehicle. |
| C.A.R.B. E.O. Number | N/A |
| 404 | Serpentine |
| 3390 | Performance |
| 356 | 2 |
| California Proposition 65 | WARNING: Cancer and Reproductive Harm P65Warnings.ca.gov |
| Camshaft Gear Material | Billet Steel |
| Crankshaft Gear Material | Billet Steel |
| Engine Family | GM LS1, LS2, LS3, LS6, LS7 |
| Title | Billet Belt Tensioner for GM LS1, LS2, LS3, LS6 and LS7 |
| Amazon ASIN | B001O0FVV8 |
| C.A.R.B. Exempt for Racing and Off-Road Only Vehicles? | Yes, but must be a race/competition only vehicle. |
| C.A.R.B. Exempt for Federally Certified Vehicles Manufactured Before 1967? | Yes, but must meet tailpipe emission standards for year of vehicle. |
| C.A.R.B. Exempt for California Certified Vehicles Manufactured Before 1965? | Yes, but must meet tailpipe emission standards for year of vehicle. |
| C.A.R.B. Exempt for Foreign Vehicles Manufactured Before 1967? | Yes, but must meet tailpipe emission standards for year of vehicle. |
| C.A.R.B. Exempt for On-Road Vehicles? | Yes |
| Weight | 1.45 lb |
| UPC | 036584189848 |
| Country of Origin | USA |
Verified fitment · 34 applications
- Chevrolet Camaro SS 6.2L (2010–2015)
- Chevrolet Camaro Z/28 7.0L (2014–2015)
- Chevrolet Corvette 427 7.0L (2013)
- Chevrolet Corvette 427 Limited Edition Z06 7.0L (2008)
- Chevrolet Corvette Base 6.2L (2008–2013)
- Chevrolet Corvette Grand Sport 6.2L (2010–2013)
- Chevrolet Corvette Z06 7.0L (2006–2013)
- Chevrolet Corvette Z06 Carbon 7.0L (2011)
- Chevrolet SS Base 6.2L (2014–2017)
- Pontiac G8 GXP 6.2L (2009)
| Part No. | 54021 |
|---|---|
| Brand | COMP Cams |
| Part Type | Accessory Drive Belt Tensioner Assembly |
| Weight | 1.45 lb |
| UPC | 036584189848 |
| Country of Origin | USA |
Platform-level fitment (Ford + GM, Phase 1). We publish the engine platform a part is built for — not year-and-trim application data — so nothing here confirms a fit on a specific vehicle. Confirm fitment with us before ordering: (714) 202-7886.