We are a CAPRICORN Preferred Supplier.
Perform-Ex Automotive Car Spare Parts Perform-Ex Automotive Car Spare Parts
PARTS FINDER
My Account
Wishlist
Cart 0
  • Exhaust
    • Back
    • Exhaust
    • Performance Exhaust Systems
      • 4x4 Performance
      • Street Performance
      • All Performance Exhaust Systems Products
    • Standard Replacement Exhaust Systems
    • Exhaust Accessories
      • Exhaust Bolts, Nuts & Studs
      • Clamps
      • Collectors
      • Exhaust Reducers & Couplers
      • Exhaust Tips
      • Flange Plates
      • Exhaust Flex Bellows
      • Exhaust Brackets & Hanger Rods
      • Gaskets
      • Heat Tape
      • Mandrel Bends
      • O2 Sensors & Exhaust Temperature Sensor Accessories
      • Paint
      • Muffler & Exhaust Mounting Brackets
      • Tube
      • X & Y Pipes
      • All Exhaust Accessories Products
    • Catalytic Converters
      • Direct Fit Catalytic Converters
      • Universal Catalytic Converters
      • All Catalytic Converters Products
    • DPF Filters
    • Extractors
    • Universal Mufflers & Hotdog Mufflers
    • All Exhaust Products
    • Exhaust
  • Suspension
    • Back
    • Suspension
    • Coil Springs
    • Control Arms
    • Leaf Springs
    • Lift Kits
    • Shock Absorbers and Struts
    • Strut Mount
    • Sway Bar Link
    • Airbags
    • All Suspension Products
    • Suspension
  • Performance
    • Back
    • Performance
    • Throttle Controllers
    • Snorkel
    • All Performance Products
    • Performance
  • Towing
    • Back
    • Towing
    • Accessories
    • Towbars
    • Trailer Wiring & Plugs
    • Hitches
    • All Towing Products
    • Towing
  • Filters
    • Back
    • Filters
    • Catch Cans
    • Fuel Filters
    • Performance Air Filters
    • Service Filter Kits
    • All Filters Products
    • Filters
  • Truck
    • Back
    • Truck
    • Clamps
      • Flat Back Clamps
      • Lap & Butt Clamps
      • All Clamps Products
    • Exhaust Tube
    • Mandrel Bends
    • Raincaps
    • Reducers
    • Couplers
    • Universal Mufflers
    • Flex Bellows
    • SCR Filters
    • Chrome Stacks
    • All Truck Products
    • Truck
  • Sale
  • About Us
  • Blog
  • Contact Us
  • Exhaust
    • Exhaust
    • Performance Exhaust Systems
      • 4x4 Performance
      • Street Performance
      • View All
    • Standard Replacement Exhaust Systems
    • Exhaust Accessories
      • Exhaust Bolts, Nuts & Studs
      • Clamps
      • Collectors
      • Exhaust Reducers & Couplers
      • Exhaust Tips
      • Flange Plates
      • Exhaust Flex Bellows
      • Exhaust Brackets & Hanger Rods
      • Gaskets
      • Heat Tape
      • Mandrel Bends
      • O2 Sensors & Exhaust Temperature Sensor Accessories
      • Paint
      • Muffler & Exhaust Mounting Brackets
      • Tube
      • X & Y Pipes
      • View All
    • Catalytic Converters
      • Direct Fit Catalytic Converters
      • Universal Catalytic Converters
      • View All
    • DPF Filters
    • Extractors
    • Universal Mufflers & Hotdog Mufflers
    • Exhaust
  • Suspension
    • Suspension
    • Coil Springs
    • Control Arms
    • Leaf Springs
    • Lift Kits
    • Shock Absorbers and Struts
    • Strut Mount
    • Sway Bar Link
    • Airbags
    • Suspension
  • Performance
    • Performance
    • Throttle Controllers
    • Snorkel
    • Performance
  • Towing
    • Towing
    • Accessories
    • Towbars
    • Trailer Wiring & Plugs
    • Hitches
    • Towing
  • Filters
    • Filters
    • Catch Cans
    • Fuel Filters
    • Performance Air Filters
    • Service Filter Kits
    • Filters
  • Truck
    • Truck
    • Clamps
      • Flat Back Clamps
      • Lap & Butt Clamps
      • View All
    • Exhaust Tube
    • Mandrel Bends
    • Raincaps
    • Reducers
    • Couplers
    • Universal Mufflers
    • Flex Bellows
    • SCR Filters
    • Chrome Stacks
    • Truck
  • Sale
  • About Us
  • Blog
  • Contact Us
Show Filters

Sort

Refine

  • Bolt Holes
  • Inlet
  • Tube Style
  • Material
  • Outlet
  • Barrel Shape
  • Clamp Style
  • Make
  • Model
  • OD Pipe Size
  • Length
  • Series
  • Height
  • Pipe Size
  • Bend Degrees
  • Width
  • Configuration
  • Internal Design
  • Front
  • Rear
  • ID Pipe Size
  • Rear Load Options
  • Category
  • Brand
  • Price

Exhaust Reducers & Couplers

Building or repairing an exhaust system often involves connecting pipes that were never designed to meet. A custom manifold, a performance muffler, or a universal catalytic converter can introduce different pipe diameters that bring a project to a halt. This is where exhaust reducers and adapters become the most critical components in your toolkit. 

They are the problem-solvers that bridge the gap, allowing you to mix and match parts to create a seamless, leak-free system. A high-quality exhaust reducer does more than just connect two pipes - it manages airflow efficiently, preventing bottlenecks that can rob your engine of power. Our collection is built to give you the precise fitment needed for any custom fabrication or repair job, turning a potential roadblock into a simple, effective connection.

Fast Parts Finder
  • Home
  • Exhaust
  • Exhaust Accessories
  • Exhaust Reducers & Couplers
SHOW FILTERS
  • Make
  • Universal
  • Brand
  • Perform-Ex
  • Price
  • Price
Showing 28 Results
3.5" Stainless Steel Oval to Round Exhaust Adaptor Pipe (RD350-OV)

3.5" Stainless Steel Oval to Round Exhaust Ad

Now $29.60 WAS $37.00

On Sale
REDUCER TAPERED CONE - 3.5" (89MM) TO 2.5" (63MM) X 4" LONG (304 STAINLESS STEEL)

REDUCER TAPERED CONE - 3.5" (89MM) TO 2.5&quo

$28.00

MILD STEEL EXHAUST REDUCER 5" (127MM) TO 4" (101MM) OD/OD

MILD STEEL EXHAUST REDUCER 5" (127MM) TO 4&qu

$41.00

MILD STEEL STRAIGHT EXHAUST DOUBLE COUPLER 3" 76MM ID/ID

MILD STEEL STRAIGHT EXHAUST DOUBLE COUPLER 3"

$25.00

3" Stainless Steel Oval to Round Exhaust Adaptor Pipe (RD300-OV)

3" Stainless Steel Oval to Round Exhaust Adap

Now $27.20 WAS $34.00

On Sale
4" Stainless Steel Oval to Round Exhaust Adaptor Pipe (RD400-OV)

4" Stainless Steel Oval to Round Exhaust Adap

Now $35.20 WAS $44.00

On Sale
MILD STEEL EXHAUST REDUCER 2 1/2" (63MM) TO 2 1/4" (57MM) OD/OD

MILD STEEL EXHAUST REDUCER 2 1/2" (63MM) TO 2

$31.00

MILD STEEL EXHAUST REDUCER 2 1/2" (64MM) TO 2" (51MM) OD/OD

MILD STEEL EXHAUST REDUCER 2 1/2" (64MM) TO 2

$23.00

MILD STEEL EXHAUST REDUCER 2 1/4" (57MM) TO 2" (51MM) OD/OD

MILD STEEL EXHAUST REDUCER 2 1/4" (57MM) TO 2

$14.00

MILD STEEL EXHAUST REDUCER 2 3/4" (70MM) TO 2 1/2" (63MM) OD/OD

MILD STEEL EXHAUST REDUCER 2 3/4" (70MM) TO 2

$31.00

MILD STEEL EXHAUST REDUCER 3 1/2" (89MM) TO 3" (76MM) OD/OD

MILD STEEL EXHAUST REDUCER 3 1/2" (89MM) TO 3

$31.00

MILD STEEL EXHAUST REDUCER 3" (76MM) TO 2 1/2" (64MM) OD/OD

MILD STEEL EXHAUST REDUCER 3" (76MM) TO 2 1/2

$31.00

MILD STEEL EXHAUST REDUCER 3" (76MM) TO 2 3/4" (70MM) OD/OD

MILD STEEL EXHAUST REDUCER 3" (76MM) TO 2 3/4

$31.00

MILD STEEL EXHAUST REDUCER 3" (76MM) TO 2" (51MM) OD/OD

MILD STEEL EXHAUST REDUCER 3" (76MM) TO 2&quo

$31.00

MILD STEEL EXHAUST REDUCER 4 1/2" (114MM) TO 4" (101MM) OD/OD

MILD STEEL EXHAUST REDUCER 4 1/2" (114MM) TO

$38.00

MILD STEEL EXHAUST REDUCER 4" (101MM) TO 3" (76MM) OD/OD

MILD STEEL EXHAUST REDUCER 4" (101MM) TO 3&qu

$36.00

MILD STEEL EXHAUST REDUCER 4" (101MM) TO 3.5" (89MM) OD/OD

MILD STEEL EXHAUST REDUCER 4" (101MM) TO 3.5&

$34.00

MILD STEEL EXHAUST REDUCER 5" (127MM) TO 4 1/2" (114MM) OD/OD

MILD STEEL EXHAUST REDUCER 5" (127MM) TO 4 1/

$42.00

MILD STEEL STRAIGHT EXHAUST DOUBLE COUPLER 2 1/4" 57MM ID/ID

MILD STEEL STRAIGHT EXHAUST DOUBLE COUPLER 2 1/4&q

$24.00

MILD STEEL STRAIGHT EXHAUST DOUBLE COUPLER 2" 51MM ID/ID

MILD STEEL STRAIGHT EXHAUST DOUBLE COUPLER 2"

$23.00

MILD STEEL STRAIGHT EXHAUST DOUBLE COUPLER 2.5" 63MM ID/ID (EXD2500)

MILD STEEL STRAIGHT EXHAUST DOUBLE COUPLER 2.5&quo

Now $19.60 WAS $24.50

On Sale
MILD STEEL STRAIGHT EXHAUST DOUBLE COUPLER 4" 101MM ID/ID

MILD STEEL STRAIGHT EXHAUST DOUBLE COUPLER 4"

$32.00

REDUCER TAPERED CONE - 2.5" (63MM) TO 2" (51MM) X 4" LONG (304 STAINLESS STEEL)

REDUCER TAPERED CONE - 2.5" (63MM) TO 2"

Now $22.50 WAS $25.00

On Sale
REDUCER TAPERED CONE - 3" (76MM) TO 2" (51MM) X 4" LONG (304 STAINLESS STEEL)

REDUCER TAPERED CONE - 3" (76MM) TO 2" (

Now $22.50 WAS $25.00

On Sale
  • 1
  • 2
Subscribe and get 5% off your next order

Sign up now to receive 5% off your next order and be the first to hear about upcoming deals and offers

Perform-Ex Automotive Car Spare Parts
Information
  • About Us
  • Our Blog
  • Contact Us
  • Brands
  • Shop By Car
  • Terms & Conditions
My Accounts
  • My Wish List
  • My Cart
  • Order Status
Customer support
  • Pricing & Payment
  • Shipping
  • Warranty & Returns
  • About Us
  • Contact Us
  • Blog
  • Privacy Policy
Contact Information
  • 02 6362 5900
  • sales@performexauto.com.au
Social Media
  • Facebook

© Perform-Ex Automotive 2025 - Auto Parts Online. All Rights Reserved.

  • Mastercard
  • PayPal
  • Visa
  • Bank Deposit
  • ZipPay accepted
  • Afterpay accepted
Fast Parts Finder