70 Series Big Block II Muffler Center In/Offset Out: 3"

Vehicle Info Needed

FLOWMASTERPART NUMBER: 389-853072

70 Series Big Block II Muffler Center In/Offset Out: 3"

Name: 70 Series Big Block II Muffler Center In/Offset Out: 3"
Brand: FLOWMASTER
SKU: 389-853072
Price: 249.95 USD
Availability: InStock

^$249⁹⁵

3 left in stock

Ships on Nov 02, 2026

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Center In/Offset Out

70 Series Big Block II Muffler

Center In/Offset Out: 3"

Stainless Steel

Flowmaster 853072 Features:

The 70 series utilizes Flowmaster's Delta Flow technology and an enlarged case for improved sound control along with mileage and power gains. Perfect for use on trucks, SUV's, RVs, tow vehicles and high performance street cars where space allows. Constructed of 16 gauge 409S stainless steel and fully MIG welded for maximum durability.

Minimal interior resonance
Recommended for SUV/trucks/motorhomes/tow vehicles
Improved Horsepower, Torque and Engine Efficiency
Mild to stock exterior exhaust tone

Quiet Operation, Maximum Efficiency

Flowmaster's 70 Series Big Block II Mufflers feature a longer case for increased volume and added sound reduction by utilizing Flowmaster’s patented Delta Flow Technology. The 70 Series offers maximum efficiency and minimum interior resonance, best suited for street cars, trucks, SUV’s, RVs and tow vehicles that require quiet operation with minimum improved sound. These mufflers will still fit many applications where the wider 50 Series Big Block muffler won’t.

Features:

Mild - stock exterior tone.
Best suited for quiet operation vehicles.
3-chamber, Delta Flow Technology.
Constructed of 16-gauge aluminized steel.
Fully MIG-welded.

Part TypeMuffler

Product LineFlowmaster 70 Series Big Block II Mufflers

BrandFLOWMASTER

Package Height5.9

Package Width10.8

Package Length29.3

Weight21.15 PG

Outlet Quantity1

Inlet PositionCenter

Inlet TypeWeld-On

Inlet Size (In.)3

Heat Shield AttachedNo

Body Length22 in.

Muffler Count1

Inlet Outside Diameter3.13 in.

Inlet Quantity1

Sound LevelMild

Outlet Outside Diameter3.13 in.

Muffler MaterialStainless steel

Universal Or Specific FitUniversal

Hanger IncludedNo

Inlet Connection TypePipe Connection

Outlet Diameter3 in (76.2 mm)

ColorBlack

TunableNo

Case Length22 in (558.8 mm)

Case ShapeOval

Body Width10 in.

Outlet Inside Diameter3 in.

Body Height5 in.

Outlet TypeSingle Offset Outlet

Outlet PositionOffset

Part CategoryPerformance Parts

ShapeOval

Exhaust Tip Quantity0

Inlet LocationCenter

Muffler TypeChambered

Outlet StyleStandard, without tip

Muffler FinishNatural

Mount TypeUses New Hangers (Not Included)

Inlet Diameter3 in.

Clamps IncludedNo

FinishHigh-Temperature Paint

ReversibleNo

Outlet Size3 in (76.2 mm)

Muffler Series70 Series Big Block

QuantitySold individually

Overall Length28 in.

Material409 Stainless Steel

Internal ConstructionChambered

Body Material409 Stainless Steel

Inlet Inside Diameter3 in.

Outlet LocationOffset

FitmentUniversal

Part FitmentSemi Universal

Vendor Part Number853072

Package Qty1

Package TypeEA

Please click here to download the instructions PDF file

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