Comp Cams 54021 Belt Tensioner
with Idler (Gm Ls Passenger)
Price as of 2026-06-20. Check Amazon for the current price.
Quick Decision
Is This Right For You?
- •Buyers who prioritize quality over price in belts hoses and pulleys
- •You're on a tight budget — $134 above the category average of $67
- •You prefer well-established products — only 37 reviews, so the rating may still shift
- •Rating sits in the bottom 8% of belts hoses and pulleys — higher-rated options exist
- •Spectre Performance 9741 Black 4" x 3.5" Intake Coupler — 91% cheaper at $19 (Score A+)
- •Spectre Performance 9781 Black 4" 90 Degree Boot — higher rated at 4.6/5 ($32)
📊 Based on data analysis of 51 products in this category.
Mubboo Score: C
How we calculate the Mubboo Score
Quality (45%): customer rating, normalized to a 10-point scale
Popularity (35%): review volume vs the category leader, log-scaled
Value (20%): price position vs other belts hoses and pulleys
Computed from live Amazon rating, review count, and price across 51 belts hoses and pulleys · last refreshed 2026-06-20.
How It Compares
This Product Comp Cams 54021 Belt Tensioner | Most Popular Spectre Performance 9781 Black 4" 90 Degree Boot | Best Rated Spectre Performance 9741 Black 4" x 3.5" Intake Coupler | |
|---|---|---|---|
| Price | $200.95 | $31.99 | $18.99 |
| Rating | 3.9/5 | 4.6/5 | 4.5/5 |
| Reviews | 37 | 760 | 605 |
| Mubboo Score | C | B+ | A+ |
What People Say
Synthesized from 37 reviews · 100% verified purchases.
Be prepared for potentially difficult installation; removal of intake manifold may be necessary for some hoses. Verify vehicle compatibility and consider upgrading included hose clamps.
- Flexibility and custom fit
- Good quality and durability
- Value for money
- Solves alignment and adaptation challenges
- Difficult installation
- Poor fitment and design misalignment
- Included clamps are low quality
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About Comp Cams
- 9 products in our database
- Average rating: 4.6/5 across all products
- Price range: $14.99 – $200.95
- Categories: belts-hoses-and-pulleys, engines-and-engine-parts
Other belts hoses and pulleys
Bottom Line
Comp Cams 54021 Belt Tensioner earns Mubboo Score C. Priced at $201 — a premium option, above the category average of $67. Rated 3.9/5 from 37+ reviews. Strong buy if: buyers who prioritize quality over price in belts hoses and pulleys. Skip if: you're on a tight budget — Spectre Performance 9781 Black 4" 90 Degree Boot (Score B+, $32) may fit better.
Frequently Asked Questions
Is the Comp Cams 54021 Belt Tensioner worth buying in 2026?
It earns a Mubboo Score of C, with a 3.9/5 rating from 37 reviews — better than 8% of belts hoses and pulleys we track.
How much does the Comp Cams 54021 Belt Tensioner cost?
It is currently $200.95 — premium-tier pricing for belts hoses and pulleys.
How does the 54021 Belt Tensioner compare to other belts hoses and pulleys?
The category's most-reviewed alternative is the Spectre Performance 9781 Black 4" 90 Degree Boot (4.6/5, 760 reviews, $31.99). The 54021 Belt Tensioner carries a Mubboo Score of C vs B+.
Sources & References
Mubboo may earn a commission on purchases made through affiliate links. This does not affect our Mubboo Score, product rankings, or editorial judgments. Prices are accurate as of the last sync (2026-06-20) and may change.