Street. Track. Everything between.
Your garage Find parts for your vehicle Select year, make and model to narrow your search.

Flowmaster 80 Series Crossflow Steel 2.5 Inch Muffler 42582 Muffler, Series, Crossflow, Internal Chamber, Dual Style, 2 1/2 in. Inlet/Outlet Each End, 18 x 9 3/4 x 4 in. Oval Case, Steel, Black, GM, Each

SKU: FLO42582

Mufflers

Flowmaster 80 Series Crossflow Steel 2.5 Inch Muffler 42582 Muffler, Series, Crossflow, Internal Chamber, Dual Style, 2 1/2 in. Inlet/Outlet Each End, 18 x 9 3/4 x 4 in. Oval Case, Steel, Black, GM, Each

SKU: FLO42582

Mufflers

Sale ends in Calculating...

A$558.60 A$773.77
LAST ONE! Est Ship 4-7 days. LAST ONE! This is the last unit at our distribution centre. Contact us if you need more. The ETA is the approximate time required to prepare your order for dispatch.
View cart 0
We accept
American Express
Mastercard
Visa
PayPal Checkout
Direct Deposit
Afterpay
Apple Pay
Google Pay
Zip Pay

Description

Producing an aggressive muscle car sound, the Flowmaster 80 Series crossflow mufflers are specially designed for applications where the muffler must be mounted transversely behind the rear axle. Whether you need to match an OEM exhaust system or are looking for increased ground clearance, these mufflers fit the bill. They are available in your choice of single inlet/dual outlet or dual inlet/dual outlet configurations--order yours today!

Part Type

80 Series Performance Muffler

Data: v4.2 - Upd: 2026-10-15 02:36:42

Specifications

Product Attributes - Brand
Flowmaster
Product Attributes - Manufacturer's Part Number
42582
Product Attributes - Part Type
Mufflers
Product Attributes - Product Line
Flowmaster 80 Series Crossflow Mufflers
Product Attributes - UPC
700042014750
Product Attributes - Muffler Material
Steel
Product Attributes - Inlet Diameter (in.)
2.50 in.
Product Attributes - Outlet Diameter (in.)
2.50 in.
Product Attributes - Inlet Quantity
2
Product Attributes - Outlet Quantity
2
Product Attributes - Inlet Location
Offset
Product Attributes - Outlet Location
Offset
Product Attributes - Case Shape
Oval
Product Attributes - Reversible
No
Product Attributes - Internal Construction
Chambered
Product Attributes - Muffler Finish
Black
Product Attributes - Case Exterior Length (in.)
18.00 in.
Product Attributes - Overall Length (in.)
24.00 in.
Product Attributes - Thickness (in.)
4.000
Product Attributes - Width (in.)
9.750 in.
Product Attributes - Outlet Style
Standard, without tip
Product Attributes - Remanufactured
No
Product Attributes - Quantity
Sold individually.
Product Attributes - Notes
This is a crossflow design muffler. It has one inlet and one outlet on each end.

Reference Information

Brand Name/s Flowmaster
StreetFX SKU flo42582
SFX Item ID 4983763
Supplier Item Code 4983763
Manufacturer SKU 42582
Manufacturer UPC 700042014750
Alternative References FLM42582

Compatibility

Application Data
  • UniversalYes
    MakePONTIAC
    ModelFIREBIRD
    SubmodelTRANS AM
    Beginning Year1978
    Ending Year1977
    Engine TypeV6
    Liter7.5
    CID231
    CC3800
    Engine FamilyGM V6
    Engine Size3.8L/231
    DrivetrainRWD
    Engine VIN CodeA
  • MakePONTIAC
    ModelFIREBIRD
    SubmodelTRANS AM
    Beginning Year1979
    Ending Year1979
    Engine TypeL6
    Liter7.5
    CID455
    CC7456
    Engine FamilyGM inline 6-cylinder
    Engine Size7.5L/455
    DrivetrainRWD
    Engine VIN CodeG
  • MakePONTIAC
    ModelFIREBIRD
    SubmodelTRANS AM
    Beginning Year1979
    Ending Year1981
    Engine TypeL6
    Liter4.9
    CID301
    CC4098
    Engine FamilyPontiac V8
    Engine Size4.9L/301
    DrivetrainRWD
    Engine VIN CodeM
  • MakePONTIAC
    ModelFIREBIRD
    SubmodelTRANS AM
    Beginning Year1979
    Ending Year1981
    Engine TypeL6
    Liter7.5
    CID455
    CC4098
    Engine FamilyGM inline 6-cylinder
    Engine Size7.5L/455
    DrivetrainRWD
    Engine VIN CodeW
  • MakePONTIAC
    ModelFIREBIRD
    SubmodelTRANS AM
    Beginning Year1979
    Ending Year1981
    Engine TypeL6
    Liter4.9
    CID301
    CC6555
    Engine FamilyGM inline 6-cylinder
    Engine Size4.9L/301
    DrivetrainRWD
    Engine VIN CodeS
  • MakePONTIAC
    ModelFIREBIRD
    SubmodelTRANS AM
    Beginning Year1980
    Ending Year1975
    Engine TypeL6
    Liter4.9
    CID301
    CC4098
    Engine FamilyGM inline 6-cylinder
    Engine Size4.9L/301
    DrivetrainRWD
    Engine VIN CodeT
  • MakePONTIAC
    ModelFIREBIRD
    SubmodelTRANS AM
    Beginning Year1976
    Ending Year1975
    Engine TypeL6
    Liter4.1
    CID305
    CC4098
    Engine FamilyPontiac V8
    Engine Size5.0L/305
    DrivetrainRWD
    Engine VIN CodeZ
  • MakePONTIAC
    ModelFIREBIRD
    SubmodelTRANS AM
    Beginning Year1976
    Ending Year1979
    Engine TypeV6
    Liter5.0
    CID305
    CC3800
    Engine FamilyGM V6
    Engine Size5.0L/305
    DrivetrainRWD
    Engine VIN CodeZ
  • MakePONTIAC
    ModelFIREBIRD
    SubmodelTRANS AM
    Beginning Year1977
    Ending Year1979
    Engine TypeV6
    Liter4.3
    CID403
    CC3800
    Engine FamilyOldsmobile V8
    Engine Size6.6L/403
    DrivetrainRWD
    Engine VIN CodeK
  • MakePONTIAC
    ModelFIREBIRD
    SubmodelTRANS AM
    Beginning Year1977
    Ending Year1977
    Engine TypeV6
    Liter6.6
    CID403
    CC3800
    Engine FamilyGM V6
    Engine Size6.6L/403
    DrivetrainRWD
    Engine VIN CodeK
  • MakePONTIAC
    ModelFIREBIRD
    SubmodelTRANS AM
    Beginning Year1976
    Ending Year1977
    Engine TypeV8
    Liter4.9
    CID301
    CC5733
    Engine FamilyPontiac V8
    Engine Size4.9L/301
    DrivetrainRWD
    Engine VIN CodeY
  • MakePONTIAC
    ModelFIREBIRD
    SubmodelTRANS AM
    Beginning Year1981
    Ending Year1977
    Engine TypeV8
    Liter4.3
    CID265
    CC5733
    Engine FamilyPontiac V8
    Engine Size4.3L/265
    DrivetrainRWD
    Engine VIN CodeZ
  • MakePONTIAC
    ModelFIREBIRD
    SubmodelTRANS AM
    Beginning Year1977
    Ending Year1979
    Engine TypeV6
    Liter4.9
    CID231
    CC5733
    Engine FamilyGM V6
    Engine Size3.8L/231
    DrivetrainRWD
    Engine VIN CodeZ
  • MakePONTIAC
    ModelFIREBIRD
    SubmodelTRANS AM
    Beginning Year1971
    Ending Year1981
    Engine TypeV6
    Liter4.9
    CID301
    CC7456
    Engine FamilyOldsmobile V8
    Engine Size4.9L/301
    DrivetrainRWD
    Engine VIN CodeW
  • MakePONTIAC
    ModelFIREBIRD
    SubmodelTRANS AM
    Beginning Year1976
    Ending Year1980
    Engine TypeL6
    Liter4.9
    CID301
    Engine FamilyOldsmobile V8
    Engine Size4.9L/301
    DrivetrainRWD
    Engine VIN CodeR
    CC7456
  • MakePONTIAC
    ModelFIREBIRD
    SubmodelTRANS AM
    Beginning Year1977
    Ending Year1981
    Engine TypeL6
    Liter4.9
    CID301
    Engine FamilyOldsmobile V8
    Engine Size4.9L/301
    DrivetrainRWD
    Engine VIN CodeX
    CC7456
  • MakePONTIAC
    ModelFIREBIRD
    SubmodelTRANS AM
    Beginning Year1977
    Ending Year1981
    Engine TypeL6
    Liter4.3
    CID305
    CC7456
    Engine FamilyOldsmobile V8
    Engine Size5.0L/305
    DrivetrainRWD
    Engine VIN CodeX
  • MakePONTIAC
    ModelFIREBIRD
    SubmodelTRANS AM
    Beginning Year1977
    Ending Year1981
    Engine TypeL6
    Liter7.5
    CID305
    CC7456
    Engine FamilyOldsmobile V8
    Engine Size5.0L/305
    DrivetrainRWD
    Engine VIN CodeH
  • MakePONTIAC
    ModelFIREBIRD
    SubmodelTRANS AM
    Beginning Year1970
    Ending Year1977
    Engine TypeV6
    Liter7.5
    CID231
    CC7456
    Engine FamilyGM V6
    Engine Size3.8L/231
    DrivetrainRWD
    Engine VIN CodeY
  • MakePONTIAC
    ModelFIREBIRD
    SubmodelTRANS AM
    Beginning Year1971
    Ending Year1976
    Engine TypeV6
    Liter4.9
    CID301
    CC7456
    Engine FamilyGM V6
    Engine Size4.9L/301
    DrivetrainRWD
    Engine VIN CodeX
  • MakePONTIAC
    ModelFIREBIRD
    SubmodelTRANS AM
    Beginning Year1977
    Ending Year1977
    Engine TypeL6
    Liter4.9
    CID301
    CC7456
    Engine FamilyOldsmobile V8
    Engine Size4.9L/301
    DrivetrainRWD
    Engine VIN CodeY
  • MakePONTIAC
    ModelFIREBIRD
    SubmodelTRANS AM
    Beginning Year1974
    Ending Year1976
    Engine TypeV8
    Liter4.9
    CID403
    CC7456
    Engine FamilyOldsmobile V8
    Engine Size6.6L/403
    DrivetrainRWD
    Engine VIN CodeA
  • MakePONTIAC
    ModelFIREBIRD
    SubmodelTRANS AM
    Beginning Year1974
    Ending Year1979
    Engine TypeL6
    Liter7.5
    CID403
    CC7456
    Engine FamilyOldsmobile V8
    Engine Size6.6L/403
    DrivetrainRWD
    Engine VIN CodeA
  • MakePONTIAC
    ModelFIREBIRD
    SubmodelTRANS AM
    Beginning Year1978
    Ending Year1976
    Engine TypeL6
    Liter7.5
    CID455
    Engine FamilyOldsmobile V8
    Engine Size7.5L/455
    DrivetrainRWD
    Engine VIN CodeB
    CC7456
  • MakePONTIAC
    ModelFIREBIRD
    SubmodelTRANS AM
    Beginning Year1978
    Ending Year1979
    Engine TypeL6
    Liter7.5
    CID403
    Engine FamilyOldsmobile V8
    Engine Size6.6L/403
    DrivetrainRWD
    Engine VIN CodeB
    CC7456

Loading compatibility information...

Keep shopping

More from Flowmaster