Home / Shop / Flowmaster 70 Series Big Block II Steel 3 Inch Muffler 53070 Muffler, Series, in. Inlet/3 in. Outlet, Steel, Black, Each

Flowmaster 70 Series Big Block II Steel 3 Inch Muffler 53070 Muffler, Series, in. Inlet/3 in. Outlet, Steel, Black, Each

SKU: FLO53070

Mufflers

Flowmaster

Flowmaster 70 Series Big Block II Steel 3 Inch Muffler 53070 Muffler, Series, in. Inlet/3 in. Outlet, Steel, Black, Each

SKU: FLO53070

Mufflers

LOW STOCK! Est Ship 4-7 days. HURRY! LOW STOCK. This item is in limited stock at one of our distribution centres. The ETA is the approximate time required to prepare your order for dispatch.

We accept

Description

These 70 Series Big Block II mufflers are designed around a large case for maximum volume and efficiency. They're 2 in. narrower than the original Big Block muffler, making them easier to install into tight areas. Other features include a mild, mellow exhaust tone and a resonant tuning chamber for reduced interior sound levels.

Part Type

70 Series Hi-Performance Muffler

Data: v4.2 - Upd: 2026-10-23 01:13:55

Specifications

Product Attributes - Brand: Flowmaster
Product Attributes - Manufacturer's Part Number: 53070
Product Attributes - Part Type: Mufflers
Product Attributes - Product Line: Flowmaster 70 Series Big Block II Mufflers
Product Attributes - UPC: 700042014460
Product Attributes - Muffler Material: Steel
Product Attributes - Inlet Diameter (in.): 3.00 in.
Product Attributes - Outlet Diameter (in.): 3.00 in.
Product Attributes - Inlet Quantity: 1
Product Attributes - Outlet Quantity: 1
Product Attributes - Inlet Location: Center
Product Attributes - Outlet Location: Center
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.): 22.00 in.
Product Attributes - Overall Length (in.): 28.00 in.
Product Attributes - Thickness (in.): 5.000
Product Attributes - Width (in.): 10.000 in.
Product Attributes - Outlet Style: Standard, without tip
Product Attributes - Remanufactured: No
Product Attributes - Quantity: Sold individually.

Reference Information

Brand Name/s	Flowmaster
StreetFX SKU	flo53070
SFX Item ID	4984046
Supplier Item Code	4984046
Manufacturer SKU	53070
Manufacturer UPC	700042014460
Alternative References	FLM53070, Inlet/3

Compatibility

Application Data

Universal	No
Make	GMC
Model	F-350 SUPER DUTY
Submodel	STX
Beginning Year	2003
Ending Year	2007
Engine Type	V6
Liter	6.0
CID	363
Engine Family	POWERSTROKE V8 DIESEL
Engine Size	6.0L/363
Drivetrain	4WD
Application Notes	3.0 in. Center Inlet/Outlet; Case Dimensions 5 in. x 10 in. x 22 in.; 28 in. Overall Length; Aluminized Steel Not Direct Fit-Some Adaptation Required
Engine VIN Code	P
CC	4951

Universal	No
Make	GMC
Model	F-350 SUPER DUTY
Submodel	STX
Beginning Year	2004
Ending Year	2007
Engine Type	V6
Liter	6.0
CID	363
Engine Family	FORD V6 FULL HYBRID EV-GAS (FHEV)
Engine Size	6.0L/363
Drivetrain	4WD
Engine VIN Code	8
CC	3496
Application Notes	3.0 in. Center Inlet/Outlet; Case Dimensions 5 in. x 10 in. x 22 in.; 28 in. Overall Length; Aluminized Steel Not Direct Fit-Some Adaptation Required

Universal	No
Make	GMC
Model	F-350 SUPER DUTY
Submodel	BASE
Beginning Year	1992
Ending Year	2007
Engine Type	V6
Liter	6.0
CID	363
Engine Family	FORD V6 FULL HYBRID EV-GAS (FHEV)
Engine Size	6.0L/363
Drivetrain	4WD
Application Notes	3.0 in. Center Inlet/Outlet; Case Dimensions 5 in. x 10 in. x 22 in.; 28 in. Overall Length; Aluminized Steel Not Direct Fit-Some Adaptation Required
Engine VIN Code	8
CC	3496

Universal	Yes
Make	GMC
Model	F-350 SUPER DUTY
Submodel	BASE
Beginning Year	1992
Ending Year	2018
Engine Type	V6
Liter	3.5
CID	213
Engine Family	Ford V6
Engine Size	3.5L/213
Drivetrain	4WD
Engine VIN Code	G
CC	3496
Application Notes	3.0 in. Center Inlet/Outlet; Case Dimensions 5 in. x 10 in. x 22 in.; 28 in. Overall Length; Aluminized Steel Not Direct Fit-Some Adaptation Required

Universal	No
Make	GMC
Model	F-350 SUPER DUTY
Submodel	SLE
Beginning Year	1999
Ending Year	1994
Engine Type	V6
Liter	7.3
CID	445
Engine Family	POWERSTROKE V8 DIESEL
Engine Size	7.3L/445
Drivetrain	4WD
Application Notes	3.0 in. Center Inlet/Outlet; Case Dimensions 5 in. x 10 in. x 22 in.; 28 in. Overall Length; Aluminized Steel Not Direct Fit-Some Adaptation Required
Engine VIN Code	G
CC	3496

Universal	No
Make	GMC
Model	F-350 SUPER DUTY
Submodel	SLE
Beginning Year	1999
Ending Year	2003
Engine Type	V6
Liter	7.3
CID	445
Engine Family	Ford modular V8
Engine Size	7.3L/445
Drivetrain	4WD
Engine VIN Code	F
CC	4951
Application Notes	3.0 in. Center Inlet/Outlet; Case Dimensions 5 in. x 10 in. x 22 in.; 28 in. Overall Length; Aluminized Steel Not Direct Fit-Some Adaptation Required

Universal	No
Make	GMC
Model	F-350 SUPER DUTY
Submodel	SLT
Beginning Year	1999
Ending Year	2003
Engine Type	V6
Liter	7.3
CID	445
Engine Family	Ford modular V8
Engine Size	7.3L/445
Drivetrain	4WD
Application Notes	3.0 in. Center Inlet/Outlet; Case Dimensions 5 in. x 10 in. x 22 in.; 28 in. Overall Length; Aluminized Steel Not Direct Fit-Some Adaptation Required
Engine VIN Code	5
CC	4951

Universal	No
Make	FORD
Model	F-350 SUPER DUTY
Submodel	LS
Beginning Year	2003
Ending Year	2017
Engine Type	V6
Liter	5.0
CID	302
Engine Family	Ford modular V8
Engine Size	5.0L/302
Drivetrain	4WD
Engine VIN Code	5
CC	4951
Application Notes	3.0 in. Center Inlet/Outlet; Case Dimensions 5 in. x 10 in. x 22 in.; 28 in. Overall Length; Aluminized Steel Not Direct Fit-Some Adaptation Required

Universal	No
Make	CHEVROLET
Model	C1500 SUBURBAN
Submodel	LT
Beginning Year	2003
Ending Year	2007
Engine Type	V6
Liter	6.0
CID	363
CC	3496
Engine Family	Chevy small block Gen I
Engine Size	6.0L/363
Drivetrain	4WD
Application Notes	3.0 in. Center Inlet/Outlet; Case Dimensions 5 in. x 10 in. x 22 in.; 28 in. Overall Length; Aluminized Steel Not Direct Fit-Some Adaptation Required
Engine VIN Code	5

Universal	No
Make	CHEVROLET
Model	C1500 SUBURBAN
Submodel	LT
Beginning Year	2003
Ending Year	2007
Engine Type	V6
Liter	6.0
CID	363
CC	3496
Engine Family	Chevy small block Gen I
Engine Size	6.0L/363
Drivetrain	4WD
Engine VIN Code	4
Application Notes	3.0 in. Center Inlet/Outlet; Case Dimensions 5 in. x 10 in. x 22 in.; 28 in. Overall Length; Aluminized Steel Not Direct Fit-Some Adaptation Required

Universal	No
Make	CHEVROLET
Model	C1500 SUBURBAN
Submodel	PLATINUM
Beginning Year	2003
Ending Year	2007
Engine Type	V6
Liter	6.0
CID	363
CC	3496
Engine Family	FORD V6 FULL HYBRID EV-GAS (FHEV)
Engine Size	6.0L/363
Drivetrain	RWD
Application Notes	3.0 in. Center Inlet/Outlet; Case Dimensions 5 in. x 10 in. x 22 in.; 28 in. Overall Length; Aluminized Steel Not Direct Fit-Some Adaptation Required
Engine VIN Code	P

Universal	No
Make	CHEVROLET
Model	C1500 SUBURBAN
Submodel	PLATINUM
Beginning Year	2021
Ending Year	2018
Engine Type	V6
Liter	2.7
CID	164
CC	3496
Engine Family	FORD V6 FULL HYBRID EV-GAS (FHEV)
Engine Size	2.7L/164
Drivetrain	RWD
Engine VIN Code	G
Application Notes	3.0 in. Center Inlet/Outlet; Case Dimensions 5 in. x 10 in. x 22 in.; 28 in. Overall Length; Aluminized Steel Not Direct Fit-Some Adaptation Required

Universal	No
Make	FORD
Model	F-350 SUPER DUTY
Submodel	PLATINUM
Beginning Year	1999
Ending Year	2003
Engine Type	V6
Liter	7.3
CID	445
CC	3496
Engine Family	FORD V6 FULL HYBRID EV-GAS (FHEV)
Engine Size	7.3L/445
Drivetrain	RWD
Application Notes	3.0 in. Center Inlet/Outlet; Case Dimensions 5 in. x 10 in. x 22 in.; 28 in. Overall Length; Aluminized Steel Not Direct Fit-Some Adaptation Required
Engine VIN Code	D

Universal	No
Make	FORD
Model	F-350 SUPER DUTY
Submodel	PLATINUM
Beginning Year	1999
Ending Year	2003
Engine Type	V6
Liter	7.3
CID	445
CC	3496
Engine Family	POWERSTROKE V8 DIESEL
Engine Size	7.3L/445
Drivetrain	4WD
Application Notes	3.0 in. Center Inlet/Outlet; Case Dimensions 5 in. x 10 in. x 22 in.; 28 in. Overall Length; Aluminized Steel Not Direct Fit-Some Adaptation Required
Engine VIN Code	8

Universal	No
Make	FORD
Model	F-350 SUPER DUTY
Submodel	POLICE RESPONDER
Beginning Year	1999
Ending Year	2003
Engine Type	V6
Liter	7.3
CID	445
CC	3496
Engine Family	POWERSTROKE V8 DIESEL
Engine Size	7.3L/445
Drivetrain	RWD
Engine VIN Code	8

Universal	No
Make	FORD
Model	F-350 SUPER DUTY
Submodel	HARLEY-DAVIDSON EDITION
Beginning Year	2003
Ending Year	2020
Engine Type	V6
Liter	7.3
CID	445
CC	3496
Engine Family	POWERSTROKE V8 DIESEL
Engine Size	7.3L/445
Drivetrain	4WD
Engine VIN Code	5
Application Notes	3.0 in. Center Inlet/Outlet; Case Dimensions 5 in. x 10 in. x 22 in.; 28 in. Overall Length; Aluminized Steel Not Direct Fit-Some Adaptation Required

Universal	No
Make	FORD
Model	F-350 SUPER DUTY
Submodel	XLT
Beginning Year	2003
Ending Year	2017
Engine Type	V8
Liter	7.3
CID	445
CC	4951
Engine Family	POWERSTROKE V8 DIESEL
Engine Size	7.3L/445
Drivetrain	RWD
Engine VIN Code	4
Application Notes	3.0 in. Center Inlet/Outlet; Case Dimensions 5 in. x 10 in. x 22 in.; 28 in. Overall Length; Aluminized Steel Not Direct Fit-Some Adaptation Required

Universal	No
Make	FORD
Model	F-350 SUPER DUTY
Submodel	XLT
Beginning Year	2003
Ending Year	2020
Engine Type	V8
Liter	6.0
CID	363
CC	4951
Engine Family	FORD V6 FULL HYBRID EV-GAS (FHEV)
Engine Size	6.0L/363
Drivetrain	4WD
Engine VIN Code	4
Application Notes	3.0 in. Center Inlet/Outlet; Case Dimensions 5 in. x 10 in. x 22 in.; 28 in. Overall Length; Aluminized Steel Not Direct Fit-Some Adaptation Required

Universal	No
Make	FORD
Model	F-350 SUPER DUTY
Submodel	XL
Beginning Year	2004
Ending Year	2007
Engine Type	V6
Liter	6.0
CID	363
CC	3496
Engine Family	FORD V6 FULL HYBRID EV-GAS (FHEV)
Engine Size	6.0L/363
Drivetrain	RWD
Engine VIN Code	P
Application Notes	3.0 in. Center Inlet/Outlet; Case Dimensions 5 in. x 10 in. x 22 in.; 28 in. Overall Length; Aluminized Steel Not Direct Fit-Some Adaptation Required

Universal	No
Make	FORD
Model	F-350 SUPER DUTY
Submodel	XL
Beginning Year	2004
Ending Year	2018
Engine Type	V6
Liter	6.0
CID	363
CC	3496
Engine Family	POWERSTROKE V8 DIESEL
Engine Size	6.0L/363
Drivetrain	4WD
Engine VIN Code	G
Application Notes	3.0 in. Center Inlet/Outlet; Case Dimensions 5 in. x 10 in. x 22 in.; 28 in. Overall Length; Aluminized Steel Not Direct Fit-Some Adaptation Required

Universal	No
Make	FORD
Model	F-350 SUPER DUTY
Submodel	HARLEY-DAVIDSON EDITION
Beginning Year	2004
Ending Year	2018
Engine Type	V8
Liter	6.0
CID	363
CC	4951
Engine Family	POWERSTROKE V8 DIESEL
Engine Size	6.0L/363
Drivetrain	RWD
Engine VIN Code	5
Application Notes	3.0 in. Center Inlet/Outlet; Case Dimensions 5 in. x 10 in. x 22 in.; 28 in. Overall Length; Aluminized Steel Not Direct Fit-Some Adaptation Required

Universal	No
Make	FORD
Model	F-350 SUPER DUTY
Submodel	HARLEY-DAVIDSON EDITION
Beginning Year	1999
Ending Year	2003
Engine Type	V8
Liter	7.3
CID	445
CC	4951
Engine Family	POWERSTROKE V8 DIESEL
Engine Size	7.3L/445
Drivetrain	4WD
Engine VIN Code	8
Application Notes	3.0 in. Center Inlet/Outlet; Case Dimensions 5 in. x 10 in. x 22 in.; 28 in. Overall Length; Aluminized Steel Not Direct Fit-Some Adaptation Required

Universal	No
Make	FORD
Model	F-350 SUPER DUTY
Submodel	SSV
Beginning Year	1999
Ending Year	2003
Engine Type	V8
Liter	7.3
CID	445
CC	4951
Engine Family	POWERSTROKE V8 DIESEL
Engine Size	7.3L/445
Drivetrain	RWD
Engine VIN Code	4
Application Notes	3.0 in. Center Inlet/Outlet; Case Dimensions 5 in. x 10 in. x 22 in.; 28 in. Overall Length; Aluminized Steel Not Direct Fit-Some Adaptation Required

Universal	No
Make	GMC
Model	C1500 SUBURBAN
Submodel	SSV
Beginning Year	2003
Ending Year	2003
Engine Type	V8
Liter	7.3
CID	445
CC	4951
Engine Family	Chevy small block Gen I
Engine Size	7.3L/445
Drivetrain	4WD
Engine VIN Code	4
Application Notes	3.0 in. Center Inlet/Outlet; Case Dimensions 5 in. x 10 in. x 22 in.; 28 in. Overall Length; Aluminized Steel Not Direct Fit-Some Adaptation Required

Universal	No
Make	GMC
Model	C1500 SUBURBAN
Submodel	STX
Beginning Year	2003
Ending Year	2014
Engine Type	V8
Liter	5.7
CID	350
CC	4951
Engine Family	FORD V6 FULL HYBRID EV-GAS (FHEV)
Engine Size	5.7L/350
Drivetrain	RWD
Engine VIN Code	D
Application Notes	3.0 in. Center Inlet/Outlet; Case Dimensions 5 in. x 10 in. x 22 in.; 28 in. Overall Length; Aluminized Steel Not Direct Fit-Some Adaptation Required

Loading compatibility information...

Keep shopping

Flowmaster 70 Series Big Block II Steel 3 Inch Muffler 53070 Muffler, Series, in. Inlet/3 in. Outlet, Steel, Black, Each

Flowmaster 70 Series Big Block II Steel 3 Inch Muffler 53070 Muffler, Series, in. Inlet/3 in. Outlet, Steel, Black, Each

Description

Part Type

Specifications

Reference Information

Compatibility

More from Flowmaster

Flowmaster Outlaw Series Exhaust Systems 817958 System, Series, Cat-back, Single In/Single Out, Stainless Steel, Natural, Jeep, 3.6, Kit

Flowmaster Exhaust Systems 738198 2025 RAM 1500 3.0L SIGNATURE, CB, DOR

Flowmaster FlowFX 409 Stainless Steel 2.5 Inch Muffler 71416 Muffler, Series, in. Inlet/2.5 in. Outlet, Steel, Natural, Round Body, Each

Flowmaster FlowFX 409 Stainless Steel 3 Inch Muffler 71229 Muffler, Series, in. Offset Inlet/3 in. Center Outlet, Reversible, Steel, Natural, Each

Flowmaster 2.5 IN(O)/OUT(C) 50 Series DF SS Muffler

Flowmaster 3 IN(C)/2.5 OUT(D) 50 Series DF SS Muffler