Flowmaster
Flowmaster 80 Series Chambered Muffler – 2.50" Offset In/Dual Out
Flowmaster 80 Series Chambered Muffler – 2.50" Offset In/Dual Out
SKU:F1342583
In stock
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- Free shipping on $70+
- Ships from US warehouse
- 30-day returns
The Flowmaster 42583 is a 80 series chambered muffler for Chevrolet Camaro.
Fits: Chevrolet Camaro
Key features
- Aggressive Flowmaster Sound: Transverse-mounted design delivers an aggressive exterior sound level with a deep tone, while maintaining moderate interior resonance for a balanced driving experience. It’s the ideal muffler for rear-mounted systems, making it a favorite among muscle car builders, restorers, and weekend racers. Perfect for muscle cars, retro builds, and tight-clearance applications like GM F-body vehicles (Camaro & Firebird).
- Perfect For Gm F-Body Vehicles: Designed for tight-clearance performance cars like the Chevrolet Camaro, Pontiac Firebird, and Trans Am. The transverse crossflow chambered design enhances exhaust scavenging and airflow, improving horsepower, throttle response, and delivering the aggressive Flowmaster tone. This space-saving setup fits in the stock location behind the rear axle, making it ideal for muscle cars, retro builds, and other tight-clearance applications without requiring a full custom exhaust.
- Durable Construction: Built from 16-gauge aluminized steel and fully MIG-welded for maximum strength and longevity. Resists heat, corrosion, and road damage for years of dependable performance.
- Performance-Driven Fitment: Precision-engineered for tight-clearance applications including classic GM F-body cars, retro-mods, and custom builds. Ideal for rear-mounted systems, the transverse layout mounts neatly behind the rear axle with no major modifications required. Main case dimensions: 4” x 9.5” x 15”.
- Universal Configurations Available: Offered in multiple inlet/outlet setups to match a variety of performance exhaust systems, making it a versatile choice for street, strip, or show.
Specifications
| Brand | Flowmaster |
|---|---|
| Manufacturer part number | 42583 |
| Part type | Muffler |
| UPC / GTIN | 700042010363 |
| Vehicle fitment | Chevrolet Camaro |
| Weight | 13.00 lb |
| Dimensions (L × W × H) | 24 × 10 × 4 in |
| Category | Engine & Drivetrain |
| Condition | New |
| Returns | 30-day returns on unused items |
Questions
Will this fit my vehicle?
It is listed for Chevrolet Camaro. Trim, engine and options can change the part a vehicle needs — send us your VIN and we'll confirm before you order.
What does shipping cost?
Standard shipping is free on orders of $70 or more to the lower 48 states and DC, and $8 below that. Express is $15 at checkout. Orders ship the same business day when placed early in the day, otherwise the next business day; standard delivery takes 3–5 business days. Alaska and Hawaii are charged by weight at checkout.
Can I return it?
Yes — unused items in the original packaging can be returned within 30 days of delivery. A restocking fee may apply; see our refund policy.
Shipping & delivery
Shipping & delivery
Free standard shipping on orders of $70 or more to the lower 48 states and DC; $8 on smaller orders. Express is $15 at checkout; Alaska and Hawaii are charged by weight. Orders ship from the warehouse closest to you — the same business day, or the next business day if ordered late in the day, on a weekend or holiday. Standard delivery takes 3–5 business days. Oversized items (bumpers, running boards, large tonneau covers, some marine equipment) ship LTL freight — we contact you to schedule delivery and a signature is required.
Returns & warranty
Returns & warranty
Unused, uninstalled parts in original packaging can be returned within 30 days of delivery. A restocking fee of up to 20% may apply depending on the product, and return shipping is the buyer’s responsibility unless the item arrived defective, damaged or incorrect. Items marked Final sale can't be returned. If a part fails, contact us with your order number and we'll help with the manufacturer's warranty claim.
Fitment & part numbers
Fitment & part numbers
Verify fitment with the manufacturer part number shown above and your vehicle’s year, make, model and trim. If the listing says “Fits select…”, confirm your exact application before ordering. Not sure? Send us your VIN and the part number and we’ll check it for you.
