Trick Flow Cylinder Head Emission/Thermactor Plug 5.0L/5.8L

Trick Flow: TFS-51400265
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Trick Flow Cylinder Head Emission/Thermactor Plug 5.0L/5.8L
Trick Flow Cylinder Head Emission/Thermactor Plug 5.0L/5.8L Trick Flow Cylinder Head Emission/Thermactor Plug 5.0L/5.8L Trick Flow Cylinder Head Emission/Thermactor Plug 5.0L/5.8L Trick Flow Cylinder Head Emission/Thermactor Plug 5.0L/5.8L Trick Flow Cylinder Head Emission/Thermactor Plug 5.0L/5.8L
Trick Flow

Product Description

Trick Flow Emission and Thermactor Plug for Most Aftermarket 5.0L and 5.8L Cylinder Heads.

Most aftermarket cylinder heads are not side specific. These thermactor plugs are designed to plug into your heads, to change the thread size to allow you to use your factory accessory drive brackets. These plugs are also used to close off any air passages in your heads.

Made from steel and then zinc plated. Features a 5/8"-11 male thread pattern.

*Sold individually, use 2 per car.

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Installation Instructions

Mustang Installation

Product Reviews

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Product Questions

My 1966 289 engine uses 1/2" -20 thermactor plugs. The thermactor plugs on the web site are 5/8" not 1/2". Does anybody make a 1/2" plugs?

Asked by: JKD60
Maybe you could reduce it by using a helicoil.
Answered by: rk cjpp
Date published: 2017-10-09

Do these plugs fit 66 and later 289/302 heads with thermactor ports?

Asked by: Shinoda
This will fit heads that have the emission ports for the exhaust cross over tube.
Answered by: rk cjpp
Date published: 2017-09-28

Is it pack of two plugs or one?

Asked by: Rezor
They're sold individually.
Answered by: CJ Pony Parts
Date published: 2015-06-08
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