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Hedman Hedders 21133 Exhaust Header Reducer


Hedman Hedders

Part Number

03/05/2034 1:57 AM
Sale Price


In Stock (10+)

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Usually delivered within 2 days

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No Hassle Returns

No Hassle Returns

Live-in-stock inventory

Live-in-stock inventory

Fitment guaranteed

Fitment guaranteed

Product Details

Hedman Hedders 21133 Exhaust Header Reducer

This reducer is not legal for sale or use in California on pollution-controlled vehicles.

This Hedman reducer allows you to retain an oxygen sensor when you add on headers. It comes with the necessary flange gasket and hardware needed to adapt your exhaust to your headers.

  • Oxygen Sensor Reducer

Products specifications

Bolts/Studs Included


Collector Attachment

3-bolt flange

Oxygen Sensor Bung Included



Sold individually.

Reducer Finish


Reducer Material


Reducer Outlet Diameter

3 in.

Great experience so far

Arrived earlier than expected. Parts fit well. Nearly perfectly, buttons sit a tad higher than the originals but the package included an entire set, so replaced them all. Great.

Easy checkout.

Great price and easy to find parts.

Excellent. Exactly as shown, just what I needed. Quick delivery. Great price.

Autoplicity simply had the best prices available and everything was in stock to be shipped.

Perfect so far!

it was very easy and simple, thank you

Autoplicity leads the way ! Others take a lesson !! Great prices and excellent service !!!

No problems ordering a leak down tester from Autoplicity which had the lowest price and reasonable shipping charges. The item was well packaged and I would buy from them again.

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