Skip to content
Home About Contact News Returns Support Tracking

Tube Fittings (Transitions, etc.)

Ace Race Parts carries a variety of exhaust pipe adapters, connectors, couplers, and other fittings. Our 304 Stainless Steel and 6061 Aluminum Tube Fittings are a high-quality, cost-effective solution for header, exhaust, intake, and downpipe builders.

Our 304 Stainless Steel Exhaust Fittings are manufactured to the stringent ASTM... Read More

  • 2.000" OD x 1.500" OD 16ga Reducer (2.000" Long) - Polished OD/ID - 304 Stainless

    2.000" OD x 1.500" OD 16ga Reducer (2.000" Long) - Brushed Finish - 304 Stainless

    SKU 25004
    $ 14.25 - $ 14.25
    $ 14.25
    $ 14.25 - $ 14.25
    $ 14.25
    25+ in stock

    A SMOOTH, FREE-FLOWING WAY TO STEP UP OR DOWN IN SIZE! The Ace Race Parts brand of 304 Stainless Exhaust Reducers is the fabricator's and manufact...

    View full details
  • 2.500" OD x 2.000" OD 16ga Reducer (2.000" Long) - Polished OD/ID - 304 Stainless

    2.500" OD x 2.000" OD 16ga Reducer (2.000" Long) - Brushed Finish - 304 Stainless

    SKU 25007
    $ 15.95 - $ 15.95
    $ 15.95
    $ 15.95 - $ 15.95
    $ 15.95
    25+ in stock

    A SMOOTH, FREE-FLOWING WAY TO STEP UP OR DOWN IN SIZE! The Ace Race Parts brand of 304 Stainless Exhaust Reducers is the fabricator's and manufact...

    View full details
  • 2.500" OD x 2.250" OD 16ga Reducer (2.500" Long) - Polished OD/ID - 304 Stainless

    2.500" OD x 2.250" OD 16ga Reducer (2.500" Long) - Brushed Finish - 304 Stainless

    SKU 25024
    $ 12.95 - $ 12.95
    $ 12.95
    $ 12.95 - $ 12.95
    $ 12.95
    25+ in stock

    A SMOOTH, FREE-FLOWING WAY TO STEP UP OR DOWN IN SIZE! The Ace Race Parts brand of 304 Stainless Exhaust Reducers is the fabricator's and manufact...

    View full details
  • 3.000" OD x 2.000" OD 16ga Reducer (4.000" Long) - Polished OD/ID - 304 Stainless

    3.000" OD x 2.000" OD 16ga Reducer (4.000" Long) - Brushed Finish - 304 Stainless

    SKU 25009
    $ 15.95 - $ 15.95
    $ 15.95
    $ 15.95 - $ 15.95
    $ 15.95
    25+ in stock

    A SMOOTH, FREE-FLOWING WAY TO STEP UP OR DOWN IN SIZE! The Ace Race Parts brand of 304 Stainless Exhaust Reducers is the fabricator's and manufact...

    View full details
  • 3.000" OD x 2.250" OD 16ga Reducer (2.500" Long) - Polished OD/ID - 304 Stainless

    3.000" OD x 2.250" OD 16ga Reducer (2.500" Long) - Brushed Finish - 304 Stainless

    SKU 25026
    $ 15.95 - $ 15.95
    $ 15.95
    $ 15.95 - $ 15.95
    $ 15.95
    25+ in stock

    A SMOOTH, FREE-FLOWING WAY TO STEP UP OR DOWN IN SIZE! The Ace Race Parts brand of 304 Stainless Exhaust Reducers is the fabricator's and manufact...

    View full details
  • 3.000" OD x 2.500" OD 16ga Reducer (2.500" Long) - Polished OD/ID - 304 Stainless

    3.000" OD x 2.500" OD 16ga Reducer (2.500" Long) - Brushed Finish - 304 Stainless

    SKU 25010
    $ 16.95 - $ 16.95
    $ 16.95
    $ 16.95 - $ 16.95
    $ 16.95
    25+ in stock

    A SMOOTH, FREE-FLOWING WAY TO STEP UP OR DOWN IN SIZE! The Ace Race Parts brand of 304 Stainless Exhaust Reducers is the fabricator's and manufact...

    View full details
  • 3.500" OD x 3.000" OD 16ga Reducer (3.000" Long) - Polished OD/ID - 304 Stainless

    3.500" OD x 3.000" OD 16ga Reducer (3.000" Long) - Brushed Finish - 304 Stainless

    SKU 25029
    $ 17.95 - $ 17.95
    $ 17.95
    $ 17.95 - $ 17.95
    $ 17.95
    25+ in stock

    A SMOOTH, FREE-FLOWING WAY TO STEP UP OR DOWN IN SIZE! The Ace Race Parts brand of 304 Stainless Exhaust Reducers is the fabricator's and manufact...

    View full details
  • 4.000" OD x 3.000" OD 16ga Reducer (4.000" Long) - Polished OD/ID - 304 Stainless

    4.000" OD x 3.000" OD 16ga Reducer (4.000" Long) - Brushed Finish - 304 Stainless

    SKU 25012
    $ 26.95 - $ 26.95
    $ 26.95
    $ 26.95 - $ 26.95
    $ 26.95
    25+ in stock

    A SMOOTH, FREE-FLOWING WAY TO STEP UP OR DOWN IN SIZE! The Ace Race Parts brand of 304 Stainless Exhaust Reducers is the fabricator's and manufact...

    View full details
  • 4.000" OD x 3.500" OD 16ga Reducer (3.000" Long) - Polished OD/ID - 304 Stainless

    4.000" OD x 3.500" OD 16ga Reducer (3.000" Long) - Brushed Finish - 304 Stainless

    SKU 25034
    $ 26.95 - $ 26.95
    $ 26.95
    $ 26.95 - $ 26.95
    $ 26.95
    25+ in stock

    A SMOOTH, FREE-FLOWING WAY TO STEP UP OR DOWN IN SIZE! The Ace Race Parts brand of 304 Stainless Exhaust Reducers is the fabricator's and manufact...

    View full details
  • 5.000" OD x 3.000" OD 14ga Reducer (5.000" Long) - Polished OD/ID - 304 Stainless

    5.000" OD x 3.000" OD 14ga Reducer (5.000" Long) - Brushed Finish - 304 Stainless

    SKU 25035
    $ 37.95 - $ 37.95
    $ 37.95
    $ 37.95 - $ 37.95
    $ 37.95
    25+ in stock

    A SMOOTH, FREE-FLOWING WAY TO STEP UP OR DOWN IN SIZE! The Ace Race Parts brand of 304 Stainless Exhaust Reducers is the fabricator's and manufact...

    View full details
  • 5.000" OD x 3.500" OD 14ga Reducer (5.000" Long) - Polished OD/ID - 304 Stainless
    Sold out

    5.000" OD x 3.500" OD 14ga Reducer (5.000" Long) - Brushed Finish - 304 Stainless

    SKU 25036
    $ 37.95 - $ 37.95
    $ 37.95
    $ 37.95 - $ 37.95
    $ 37.95
    Out of stock

    A SMOOTH, FREE-FLOWING WAY TO STEP UP OR DOWN IN SIZE! The Ace Race Parts brand of 304 Stainless Exhaust Reducers is the fabricator's and manufact...

    View full details
  • 5.000" OD x 4.000" OD 14ga Reducer (5.000" Long) - Polished OD/ID - 304 Stainless

    5.000" OD x 4.000" OD 14ga Reducer (5.000" Long) - Brushed Finish - 304 Stainless

    SKU 25037
    $ 37.95 - $ 37.95
    $ 37.95
    $ 37.95 - $ 37.95
    $ 37.95
    25+ in stock

    A SMOOTH, FREE-FLOWING WAY TO STEP UP OR DOWN IN SIZE! The Ace Race Parts brand of 304 Stainless Exhaust Reducers is the fabricator's and manufact...

    View full details
  • 2.500" OD x 2.000" OD 16ga Reducer 6061 Aluminum - (3.000" Long) - Ace Race Parts

    2.500" OD x 2.000" OD 16ga Reducer - Polished OD - 6061 Aluminum - (3.000" Long)

    SKU 13051
    $ 14.50 - $ 14.50
    $ 14.50
    $ 14.50 - $ 14.50
    $ 14.50
    Only 5 left!

    A SMOOTH, FREE-FLOWING WAY TO STEP UP OR DOWN IN SIZE! The Ace Race Parts brand of 6061-T6 Aluminum Transition Reducers is the fabricator's and ma...

    View full details
  • 3.000" OD x 2.500" OD 16ga Reducer 6061 Aluminum - (3.000" Long) - Ace Race Parts

    3.000" OD x 2.500" OD 16ga Reducer - Polished OD - 6061 Aluminum - (3.000" Long)

    SKU 13052
    $ 15.50 - $ 15.50
    $ 15.50
    $ 15.50 - $ 15.50
    $ 15.50
    Only 7 left!

    A SMOOTH, FREE-FLOWING WAY TO STEP UP OR DOWN IN SIZE! The Ace Race Parts brand of 6061-T6 Aluminum Transition Reducers is the fabricator's and ma...

    View full details
  • 3.500" OD x 3.000" OD 16ga Reducer 6061 Aluminum - (3.000" Long) - Ace Race Parts

    3.500" OD x 3.000" OD 16ga Reducer - Polished OD - 6061 Aluminum - (3.000" Long)

    SKU 13053
    $ 16.00 - $ 16.00
    $ 16.00
    $ 16.00 - $ 16.00
    $ 16.00
    Only 16 left!

    A SMOOTH, FREE-FLOWING WAY TO STEP UP OR DOWN IN SIZE! The Ace Race Parts brand of 6061-T6 Aluminum Transition Reducers is the fabricator's and ma...

    View full details
  • 4.000" OD x 3.000" OD 16ga Reducer 6061 Aluminum - (3.000" Long) - Ace Race Parts
    Sold out

    4.000" OD x 3.000" OD 14ga Reducer - Polished OD - 6061 Aluminum - (3.000" Long)

    SKU 13054
    $ 16.50 - $ 16.50
    $ 16.50
    $ 16.50 - $ 16.50
    $ 16.50
    Out of stock

    A SMOOTH, FREE-FLOWING WAY TO STEP UP OR DOWN IN SIZE! The Ace Race Parts brand of 6061-T6 Aluminum Transition Reducers is the fabricator's and ma...

    View full details
  • 4.000" OD x 3.500" OD 16ga Reducer 6061 Aluminum - (3.000" Long) - Ace Race Parts

    4.000" OD x 3.500" OD 14ga Reducer - Polished OD - 6061 Aluminum - (3.000" Long)

    SKU 13055
    $ 17.00 - $ 17.00
    $ 17.00
    $ 17.00 - $ 17.00
    $ 17.00
    Only 21 left!

    A SMOOTH, FREE-FLOWING WAY TO STEP UP OR DOWN IN SIZE! The Ace Race Parts brand of 6061-T6 Aluminum Transition Reducers is the fabricator's and ma...

    View full details
  • Titanium Exhaust Reducer CP1 Titanium | Ace Race Parts

    3.000" OD x 2.500" OD 0.039" (1mm) Reducer CP1 Titanium - (1.188" Long)

    SKU 75004
    $ 38.00 - $ 38.00
    $ 38.00
    $ 38.00 - $ 38.00
    $ 38.00
    Only 9 left!

    ULTRA LIGHTWEIGHT, THIN WALL CP1 TITANIUM TRANSITION REDUCER The Ace Race Parts brand of CP1 Titanium Transition Reducers is the preferred choice ...

    View full details
  • Titanium Exhaust Reducer CP1 Titanium | Ace Race Parts

    3.500" OD x 3.000" OD 0.039" (1mm) Reducer CP1 Titanium - (1.188" Long)

    SKU 75005
    $ 33.50 - $ 33.50
    $ 33.50
    $ 33.50 - $ 33.50
    $ 33.50
    Only 2 left!

    ULTRA LIGHTWEIGHT, THIN WALL CP1 TITANIUM TRANSITION REDUCER The Ace Race Parts brand of CP1 Titanium Transition Reducers is the preferred choice ...

    View full details
  • Titanium Exhaust Reducer CP1 Titanium | Ace Race Parts
    Sold out

    4.000" OD x 3.000" OD 0.039" (1mm) Reducer CP1 Titanium - (2.375" Long)

    SKU 75006
    $ 49.50 - $ 49.50
    $ 49.50
    $ 49.50 - $ 49.50
    $ 49.50
    Out of stock

    ULTRA LIGHTWEIGHT, THIN WALL CP1 TITANIUM TRANSITION REDUCER The Ace Race Parts brand of CP1 Titanium Transition Reducers is the preferred choice ...

    View full details
  • Titanium Exhaust Reducer CP1 Titanium | Ace Race Parts

    4.000" OD x 3.500" OD 0.039" (1mm) Reducer CP1 Titanium - (2.375" Long)

    SKU 75007
    $ 42.00 - $ 42.00
    $ 42.00
    $ 42.00 - $ 42.00
    $ 42.00
    Only 11 left!

    ULTRA LIGHTWEIGHT, THIN WALL CP1 TITANIUM TRANSITION REDUCER The Ace Race Parts brand of CP1 Titanium Transition Reducers is the preferred choice ...

    View full details
  • Vibrant 3" Oval to 3" OD Round Transition - 6" Long (13170) - Ace Race Parts

    Vibrant 3" Oval to 3" OD Round Transition - 6" Long (13170)

    SKU VIB13170
    $ 54.99 - $ 54.99
    $ 54.99
    $ 54.99 - $ 54.99
    $ 54.99
    Only 2 left!

    Tube Diameter - 3.00" Oval to 3" O.D. Round Transition Length - 6" Tube Thickness - 0.065" (1.65mm) T304 Stainless Steel is a non-magnetic alloy th...

    View full details
  • Vibrant 3.5" Oval to 3.5" OD Round Transition - 6" Long (13171) - Ace Race Parts

    Vibrant 3.5" Oval to 3.5" OD Round Transition - 6" Long (13171)

    SKU VIB13171
    $ 64.99 - $ 64.99
    $ 64.99
    $ 64.99 - $ 64.99
    $ 64.99
    Only 1 left!

    Tube Diameter - 3.50" Oval to 3.50" O.D. Round Transition Length - 6" Tube Thickness - 0.065" (1.65mm) T304 Stainless Steel is a non-magnetic alloy...

    View full details
  • Vibrant 4" Oval to 4" OD Round Transition - 6" Long (13172) - Ace Race Parts

    Vibrant 4" Oval to 4" OD Round Transition - 6" Long (13172)

    SKU VIB13172
    $ 72.99 - $ 72.99
    $ 72.99
    $ 72.99 - $ 72.99
    $ 72.99
    Only 1 left!

    Tube Diameter - 4" Oval to O.D. Round Transition Adapter Length - 6" Tube Thickness - 0.065" (1.65mm) T304 Stainless Steel is a non-magnetic alloy ...

    View full details
  • 2.000" OD Double Slip Joint Adapter - Polished OD - 304 Stainless

    2.000" OD Double Slip Joint Adapter - Polished OD - 304 Stainless

    SKU 25061
    $ 31.95 - $ 31.95
    $ 31.95
    $ 31.95 - $ 31.95
    $ 31.95
    25+ in stock

    TRUSTED BY THE INDUSTRY'S TOP FABRICATORS AND MANUFACTURERS! The Ace Race Parts line of low-profile Double Slip Joint Adapters feature a 3-piece l...

    View full details
  • 3.000" OD Double Slip Joint Adapter - Polished OD - 304 Stainless

    2.500" OD Double Slip Joint Adapter - Polished OD - 304 Stainless

    SKU 25064
    $ 35.95 - $ 35.95
    $ 35.95
    $ 35.95 - $ 35.95
    $ 35.95
    25+ in stock

    TRUSTED BY THE INDUSTRY'S TOP FABRICATORS AND MANUFACTURERS! The Ace Race Parts line of low-profile Double Slip Joint Adapters feature a 3-piece l...

    View full details
  • 3.000" OD Double Slip Joint Adapter - Polished OD - 304 Stainless

    3.000" OD Double Slip Joint Adapter - Polished OD - 304 Stainless

    SKU 25065
    $ 39.95 - $ 39.95
    $ 39.95
    $ 39.95 - $ 39.95
    $ 39.95
    25+ in stock

    TRUSTED BY THE INDUSTRY'S TOP FABRICATORS AND MANUFACTURERS! The Ace Race Parts line of low-profile Double Slip Joint Adapters feature a 3-piece l...

    View full details

  • 2.500" OD Aluminum Joiner with Bead Rolled Ends - Polished OD - 6061 Aluminum

    SKU 14105
    $ 11.99 - $ 11.99
    $ 11.99
    $ 11.99 - $ 11.99
    $ 11.99
    25+ in stock

    POLISHED ALUMINUM JOINER WITH BEAD ROLLED ENDS The Ace Race Parts brand of Aluminum Joiners are manufactured from 6061 Aluminum and is an excellent...

    View full details

  • 3.000" OD Aluminum Joiner with Bead Rolled Ends - Polished OD - 6061 Aluminum

    SKU 14106
    $ 13.99 - $ 13.99
    $ 13.99
    $ 13.99 - $ 13.99
    $ 13.99
    25+ in stock

    POLISHED ALUMINUM JOINER WITH BEAD ROLLED ENDS The Ace Race Parts brand of Aluminum Joiners are manufactured from 6061 Aluminum and is an excellent...

    View full details

  • 3.500" OD Aluminum Joiner with Bead Rolled Ends - Polished OD - 6061 Aluminum

    SKU 14107
    $ 15.75 - $ 15.75
    $ 15.75
    $ 15.75 - $ 15.75
    $ 15.75
    25+ in stock

    POLISHED ALUMINUM JOINER WITH BEAD ROLLED ENDS The Ace Race Parts brand of Aluminum Joiners are manufactured from 6061 Aluminum and is an excellent...

    View full details

  • 4.000" OD Aluminum Joiner with Bead Rolled Ends - Polished OD - 6061 Aluminum

    SKU 14108
    $ 15.99 - $ 15.99
    $ 15.99
    $ 15.99 - $ 15.99
    $ 15.99
    25+ in stock

    POLISHED ALUMINUM JOINER WITH BEAD ROLLED ENDS The Ace Race Parts brand of Aluminum Joiners are manufactured from 6061 Aluminum and is an excellent...

    View full details
  • Vibrant Slip Joint Adapter for 1.500" OD Tubing (3 Piece Assembly) - Ace Race Parts
    Sold out

    Vibrant Slip Joint Adapter for 1.500" OD Tubing (3 Piece Assembly)

    SKU VIB13282
    $ 33.79 - $ 33.79
    $ 33.79
    $ 33.79 - $ 33.79
    $ 33.79
    Out of stock

    The Vibrant Performance 304 Stainless Steel Double Slip Joint Exhaust Fittings are available for 1.500" to 3.000" OD tubing. Ideal for achieving t...

    View full details
  • Vibrant Slip Joint Adapter for 1.750" OD Tubing (3 Piece Assembly) - Ace Race Parts
    Sold out

    Vibrant Slip Joint Adapter for 1.750" OD Tubing (3 Piece Assembly)

    SKU VIB13284
    $ 36.79 - $ 36.79
    $ 36.79
    $ 36.79 - $ 36.79
    $ 36.79
    Out of stock

    The Vibrant Performance 304 Stainless Steel Double Slip Joint Fittings are available for 1.500" to 3.000" OD tubing. Ideal for achieving the lowes...

    View full details
  • Vibrant Slip Joint Adapter for 2.000" OD Tubing (3 Piece Assembly) - Ace Race Parts

    Vibrant Slip Joint Adapter for 2.000" OD Tubing (3 Piece Assembly)

    SKU VIB13286
    $ 42.99 - $ 42.99
    $ 42.99
    $ 42.99 - $ 42.99
    $ 42.99
    Only 2 left!

    The Vibrant Performance 304 Stainless Steel Double Slip Joint Fittings are available for 1.500" to 3.000" OD tubing. Ideal for achieving the lowes...

    View full details
  • Vibrant Slip Joint Adapter for 2.500" OD Tubing (3 Piece Assembly) - Ace Race Parts
    Sold out

    Vibrant Slip Joint Adapter for 2.500" OD Tubing (3 Piece Assembly)

    SKU VIB13290
    $ 49.99 - $ 49.99
    $ 49.99
    $ 49.99 - $ 49.99
    $ 49.99
    Out of stock

    The Vibrant Performance 304 Stainless Steel Double Slip Joint Fittings are available for 1.500" to 3.000" OD tubing. Ideal for achieving the lowes...

    View full details
  • Vibrant Slip Joint Adapter for 3.000" OD Tubing (3 Piece Assembly) - Ace Race Parts
    Sold out

    Vibrant Slip Joint Adapter for 3.000" OD Tubing (3 Piece Assembly)

    SKU VIB13292
    $ 62.99 - $ 62.99
    $ 62.99
    $ 62.99 - $ 62.99
    $ 62.99
    Out of stock

    The Vibrant Performance 304 Stainless Steel Double Slip Joint Fittings are available for 1.500" to 3.000" OD tubing. Ideal for achieving the lowes...

    View full details
  • 5.000" OD x 4.000" OD 14ga Reducer (5.000" Long) - Polished OD/ID - 304 Stainless

    6.000" OD x 5.000" OD 14ga Reducer (5.000" Long) - Brushed Finish - 304 Stainless

    SKU 25038
    $ 47.95 - $ 47.95
    $ 47.95
    $ 47.95 - $ 47.95
    $ 47.95
    25+ in stock

    A SMOOTH, FREE-FLOWING WAY TO STEP UP OR DOWN IN SIZE! The Ace Race Parts brand of 304 Stainless Exhaust Reducers is the fabricator's and manufact...

    View full details