Flowmaster 815425 Outlaw Race 2.50in Center Out 409S Muffler
with Aggressive Sound
Price as of 2026-06-20. Check Amazon for the current price.
Quick Decision
Price Intelligence
- Budget:$3–$36
- Mid-range:$36–$116
- Premium:$116+← You are here
Is This Right For You?
- •Buyers who prioritize quality over price in exhaust systems and parts
- •Those who want a top-rated option — in the top 8% of exhaust systems and parts by rating
- •Flowmaster loyalists — the brand spans 23 products in our database
- •You're on a tight budget — $95 above the category average of $79
- •You prefer well-established products — only 83 reviews, so the rating may still shift
- •Flowmaster 42543 Chambered Muffler 40 Series 2.50 Offset In — 48% cheaper at $90 (Score B+)
📊 Based on data analysis of 193 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 exhaust systems and parts
Computed from live Amazon rating, review count, and price across 193 exhaust systems and parts available to US consumers · last refreshed 2026-06-20.
How It Compares
This Product Flowmaster 815425 Outlaw Race 2.50in Center Out 409S Muffler | Most Popular MagnaFlow Exhaust Products MagnaFlow Performance Exhaust Muffler 10414: 2"/2" | Best Rated Vibrant Performance 1141 2.5' Ultra Quiet Resonator | Best Value Flowmaster 42543 Chambered Muffler 40 Series 2.50 Offset In | |
|---|---|---|---|---|
| Price | $174.55 | $105.99 | $125.78 | $89.96 |
| Rating | 4.7/5 | 4.7/5 | 4.7/5 | 4.7/5 |
| Reviews | 83 | 1,081 | 1,021 | 531 |
| Mubboo Score | C+ | B+ | B+ | B+ |
What People Say
Synthesized from 40 reviews · 100% verified purchases.
Choose mufflers matching your engine size and volume preference; Thrush and MagnaFlow offer deep drone-free tones for most engines, while Cherry Bombs are very loud and may degrade to a straight pipe over time. For heat wraps, proper surface preparation and extra adhesive prevent peeling.
- Affordable price and great value
- Easy installation
- Deep, aggressive sound without excessive drone
- Effective heat reflection and protection
- Sound may be weak or raspy on certain engines
- Minor manufacturing and quality inconsistencies
- Adhesive weakness or peeling on heat tape
Related Video Reviews
- 📹 🔊Top 7 Exhausts for 5.0 F150 (‘15–‘20) | Best Deals 2026 — MyOffroadGear
About Flowmaster
- 23 products in our database
- Average rating: 4.6/5 across all products
- Price range: $89.96 – $269.95
- Categories: exhaust-systems-and-parts
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Bottom Line
Flowmaster 815425 Outlaw Race 2.50in Center Out 409S Muffler earns Mubboo Score C+. Priced at $175 — a premium option, above the category average of $79. Rated 4.7/5 from 83+ reviews. Strong buy if: buyers who prioritize quality over price in exhaust systems and parts, those who want a top-rated option. Skip if: you're on a tight budget — MagnaFlow Exhaust Products MagnaFlow Performance Exhaust Muffler 10414: 2"/2" (Score B+, $106) may fit better.
Frequently Asked Questions
Is the Flowmaster 815425 Outlaw Race 2.50in Center Out 409S Muffler worth buying in 2026?
It earns a Mubboo Score of C+, with a 4.7/5 rating from 83 reviews — better than 92% of exhaust systems and parts we track.
How much does the Flowmaster 815425 Outlaw Race 2.50in Center Out 409S Muffler cost?
It is currently $174.55 — premium-tier pricing for exhaust systems and parts.
How does the 815425 Outlaw Race 2.50in Center Out 409S Muffler compare to other exhaust systems and parts?
The category's most-reviewed alternative is the MagnaFlow Exhaust Products MagnaFlow Performance Exhaust Muffler 10414: 2"/2" (4.7/5, 1,081 reviews, $105.99). The 815425 Outlaw Race 2.50in Center Out 409S Muffler carries a Mubboo Score of C+ vs B+.
Sources & References
Products available through US retailers. Prices in USD. Sales tax varies by state and is not included.
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.