1979-95 Ford Mustang Cylinder Head Smog Plugs - 5.0 5.8 by 5.0 Resto

Mustang Cylinder Head Smog Plugs (79-95) 5.0 5.8


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Mustang Cylinder Head Smog Plugs (79-95) 5.0 5.8

Complete your 1979-1995 Mustang smog elimination mod correctly with these 5.0 Resto cylinder head plugs!

Item #LRS-6086AK

Everyday Low Price: $12.99

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Benefits

  • Completes Removal of Smog Cross-Over Tube
  • Needed for aftermarket Cylinder heads

Features

  • Correct Thread Pitch
  • Perfect fit for OEM Thermactor Smog Port
  • Works in aftermarket heads too!

What's in the Box

  • (2) Smog Plugs/Threaded Inserts

Product Description

1979-1995 Mustang 5.0 Resto Smog Pump Head Plugs
If you remove the Thermactor smog tube off of your 1979-1995 Mustang, there are holes on the back of the head that will be exposed, and need to be plugged up. If not, then you'll have a nice little exhaust leak on your hands. 5.0 Resto has your solution! These are the threaded insert that screws into the end of the head to block off the smog port.

Not only does it block off the rear ports, but this is a replacement for the insert used on the front ports for accessory mounting bolts. You'll need these if you've purchased aftermarket cylinder heads.

Specs
Outer threads measure 5/8x11 and internal threads measure 7/16x14.

Application
-Fits 1979-95 Mustang 5.0/5.8


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Product Videos

1979-1995 Mustang 5.0Resto Cylinder Head Smog Plugs - Review

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Customer Photos (2)



Product Reviews (39)


4.5
out of 5 stars
4.5 stars
39 reviews
5 stars    29
4 stars    4
3 stars    4
2 stars    1
1 star    1

95%
OF CUSTOMERS
RECOMMEND THIS PRODUCT
37 of 39 REVIEWS
RECOMMEND THIS PRODUCT
37 of 39 REVIEWS


5 Stars   Just the one I need!
By on 7/15/2015
Image uploaded by Jay B. I was always skeptic about these, but I decided to give it a try, and viola, leak is gone. I looked at it and the quality was great, looks durable, but asked myself whats the easiest way to do this, being there's not muh room back there, so I decided to use a couple bolts to help me install it, mad the install a breeze.

Yes, I would recommend this item to a friend!


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5 Stars   Thermactor Plugs
By on 10/13/2014
Image uploaded by Daniel W. When getting rid of emissions, these plugs are great. I dabbed a little hi temp silicone on them and screwed them right in, no leaks. They are the same plugs Ford uses on the front of the heads and have threads inside for accessories or brackets. I was told a bolt would fit, but for 10 bucks and fast free shipping, why have some ugly bolts sticking out?? Buy these plugs and DO IT RIGHT!

Yes, I would recommend this item to a friend!


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5 Stars   Great, but clean up the threads first!
By on 3/6/2014
Saved a trip to the hardware store and exact fit! Just clean the threads on the back of the heads or you will have a tough time installing. I deleted my smog pump and there isn't a lot of clearance to reach back there, but spray brake cleaner in there.
Definitely recommended!

Yes, I would recommend this item to a friend!


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5 Stars   saved the rebuild
By on 2/13/2014
Couldn't finish the rebuild with out this part thanks!

Yes, I would recommend this item to a friend!


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5 Stars   Take that smog pump out! lol
By on 3/25/2014
Great way to get rid of your smog pump and block the exhaust holes in the back of your mustang heads. Just make sure you have the space and clean out the thread on the heads other wise it's almost impossible to put these on.

Yes, I would recommend this item to a friend!


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5 Stars   Great fit like warm apple pie
By on 3/27/2015
Use a poor man tap first
Get a 5/8-11 bolt 1" 1/4 long cut/grind the threads in 2 spots opposite side of each other. Use that to clean the threads then install using a 1/2 long 7 1/16 bolt

Yes, I would recommend this item to a friend!


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5 Stars   Don't go to the hardware store
By on 3/27/2014
Tried finding the correct bolt size for the EGR ports on the back on my stock 94 heads. Then I found these on the website... took the guess work out of it all together!


Yes, I would recommend this item to a friend!


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5 Stars   great
By on 7/8/2014
no more ugly smog pump lines

Yes, I would recommend this item to a friend!


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5 Stars   Nice hard to find part
By on 10/9/2014
Fit my AFR heads perfectly!

Yes, I would recommend this item to a friend!


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3 Stars   Royal pain
By on 5/12/2014
Used these to remove the cross over pipe on my 89 mustang due to the absence of a smog pump. You really need to clean out the port or these are about impossible to remove. My car has 225k miles and these holes were about solidly clogged up. There is very little room back there to spray break cleaner in there. These would be better if they had a bolt head on them. They did the job okay I guess.

Yes, I would recommend this item to a friend!


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5 Stars   Great Fit
By on 4/27/2015
Finally decided to get rid of my smog pump. Was bit of a pain to get lines that go to back of head off. But once I did I cleaned out the holes and put a little Loctite on the treads and screwed them in. No leaks no issues. Great product

Yes, I would recommend this item to a friend!


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3 Stars   Alright
By on 6/7/2014
Not an easy fit and definitely a pain if your heads are on the car. So lesson is, if your heads are off then these are awesome, if not then I would skip on these

Yes, I would recommend this item to a friend!


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1 Stars   Horrible Idea
By on 3/21/2016
I bought these to fill in the holes in the back of my heads when I deleted the smog pump. Before I go any farther though, I will say every product I have bought on LMR has been of the highest quality (and I have purchased a lot of parts for my build). LMR is by far my absolute favorite site for my Foxbody. This was actually the first product that I was really annoyed with. I had a lot of room to work when putting these in because I was able to do it from under the car. I had the transmission removed (for rebuild), and the flexplate was off as well (to replace my rear main). I tried to clean out the holes as much as possible with brake cleaner and a Q-tip. I really wanted to get a tap in there as well, but there was just not enough clearance to get one started straight (it hit the firewall no matter what I tried). I took the idea from off a forum, and tried to put a bolt in the plug for install. I have no idea why these are designed to use a screwdriver. There is no way to get a screwdriver on one of these to install it if the engine is in the car. Everything seemed to be working well for a while, until they just stopped at one point (hole was still too dirty I guess) and the true integrity of the product showed up. They began to crush, and flair on the ends (yes, I realize my bolt was probably not bottoming out in the plug, but still). Before I realized what was happening, I had a plug stuck halfway in and destroyed. It took quite a bit of time with a vice grip to get them out, and by the time they were out, they were done. I finally just ran to the hardware store and bought 5/8 bolts. The added integrtiy of the bolts (not being hollow and all) allowed me to drive them all the way in and plug the hole easily. All in all, this product sounds like a great idea in theory, but is way more trouble than it is worth.

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3 Stars   More difficult than I thought
By on 3/28/2016
The product itself is correct. The install is a challenge with motor in the vehicle. This should be sold as a kit with a 5/8 x 11 thread chaser/tap that is modified/shortened to clean the port and a small packet of loctite. I ordered the tap and cut it down so that I could remove the carbon build up in the head to allow the installation of these plugs.

Yes, I would recommend this item to a friend!


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4 Stars   Great for new heads
By on 3/29/2017
These are great for a new pair of heads but I don't recommend trying to put them in your engine if it's in your car still because the threads are almost impossible to clean in the car because of their location on the back of the head and good luck to you if you just try to force them in

Yes, I would recommend this item to a friend!


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4 Stars   Look nice
By on 6/4/2015
Looks a lot nicer than a bolt sticking out of the head, and allows you to bolt things to it if needed. I feel like $10 is a little pricey for something so simple but maybe that's so they can afford shipping and stuff considering they ship to us for free, who knows!

Yes, I would recommend this item to a friend!


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5 Stars   Perfect fit
By on 12/1/2014
Bought these because the previous owner of my 88 SSP did a mickey mouse hokey jokey job of removing the smog system, no more pesky leaks. "Anything worth doing is worth doing right". Great job late model resto.

Yes, I would recommend this item to a friend!


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4 Stars   Saved Money
By on 4/26/2016
Late model heads need a hole filled. These smog plugs fit the bill. ALSO, now the heads are interchangeable, left to right. I'm not sure of heat transfer so I will fill the plugs with bolts.

Yes, I would recommend this item to a friend!


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5 Stars   Cylinder Head Smog Plugs
By on 4/30/2015
They work well once the threads in the holes are cleaned out. Mine had a significant amount of hardened buildup in them and due to their location its very tedious trying to get them cleaned out.

Yes, I would recommend this item to a friend!


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5 Stars   FoxBodyFreak
By on 3/5/2014
Latemodel Restoration ALWAYS has the small parts I need in stock that you can't find at local shops. You Guys ROCK!! Thank you for your love for Mustang's!

Yes, I would recommend this item to a friend!


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2 Stars   Hard to get in
By on 6/16/2015
Really difficult to get in because you can only use your fingers. Unless you weld a bolt head to the end and use a wrench. It should of came like that.

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5 Stars    Perfect fit
By on 2/18/2015
I recently did away with the smog parts on my 89 fox and this was the final peice of the puzzle for me it fit great and made the project a breeze

Yes, I would recommend this item to a friend!


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5 Stars   Professional Look
By on 10/28/2014
If you remove the smog tube then you need these plugs for your heads. After installing, it looked like they actually came made with the heads.

Yes, I would recommend this item to a friend!


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5 Stars   Fit like a glove
By on 3/23/2016
Wasn't sure where I could find the part I needed to bolt my starter to the new aluminum heads I installed, LMR knew exactly what I needed.

Yes, I would recommend this item to a friend!


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5 Stars   Clean
By on 2/17/2014
Great And Easy Way To Clean Up The Engine Bay By Properly Deleting Smog Ports And Covering Accessory Holes In The Front Of The Heads

Yes, I would recommend this item to a friend!


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5 Stars   Not too shabby
By on 11/3/2015
Had to purchase a bolt to run inside the plug In order to get it to tighten down but other than that works as designed. Thanks lmr!

Yes, I would recommend this item to a friend!


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5 Stars   awesome
By on 4/19/2015
Bought these and received them promptly have not yet installed but am confident in the reviews they will do the job just fine.

Yes, I would recommend this item to a friend!


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5 Stars   awesome fit
By on 10/10/2014
I finally found these plugs save me a lot of time , now I can finish up my stang! thanks a lot!

Yes, I would recommend this item to a friend!


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5 Stars   Perfect fit
By on 3/6/2014
Easy install ended up using vice grips and some lock tite to get it seated perfectly. No leaks

Yes, I would recommend this item to a friend!


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5 Stars   Does the Job
By on 4/2/2015
Went in without a problem. Deleted all the EGR junk on my 95. Easy job thanks to Latemodel

Yes, I would recommend this item to a friend!


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5 Stars   Exactly as described
By on 5/20/2014
These work as designed. Glad I went this route over a regular hardware store plug...

Yes, I would recommend this item to a friend!


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3 Stars   Really wish it came with a tap
By on 2/23/2017
The plug works as advertised. Just really wish they would have added a tap. Ty

Yes, I would recommend this item to a friend!


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5 Stars   Just what i needed
By on 4/1/2015
kind of a pain to get in but well worth it

Yes, I would recommend this item to a friend!


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5 Stars   nice fit
By on 11/30/2016
went in easy..done in 15 minutes ..

Yes, I would recommend this item to a friend!


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5 Stars   Awesome
By on 5/11/2015
Needed quick and it got here quick.

Yes, I would recommend this item to a friend!


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5 Stars   Great part!
By on 10/13/2014
Fantastic part, excellent fit.

Yes, I would recommend this item to a friend!


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5 Stars   love them
By on 4/21/2014
great when you do a/c removal!

Yes, I would recommend this item to a friend!


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4 Stars   great fit
By on 8/15/2014
Just what the doctor ordered

Yes, I would recommend this item to a friend!


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5 Stars   Great fit
By on 3/14/2016
Fast shipping

Yes, I would recommend this item to a friend!


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Vehicle Applications

Ford Mustang - 1979 (79) - 1980 (80) - 1981 (81) - 1982 (82) - 1983 (83) - 1984 (84) - 1985 (85) - 1986 (86) - 1987 (87) - 1988 (88) - 1989 (89) - 1990 (90) - 1991 (91) - 1992 (92) - 1993 (93) - 1994 (94) - 1995 (95)


About This Brand


5.0 Resto
5.0 Resto - Dedicated To The Preservation Of The Fox Body Mustang
5.0 Resto specializes in restoration and specialty parts for 1979-1993 Ford Mustangs. Using years of experience in the late model Mustang restoration and aftermarket industry, 5.0 Resto is your source for anything Fox Mustang. While designing, and manufacturing several items such as 5-Lug Conversion Kits, weather stripping components and interior restoration items, 5.0 Resto also uses many other name brand suppliers to provide problem solving products directly to the Fox Body Mustang community. As with any part branded as 5.0 Resto, they stand behind all of these products to the fullest extent and have tested these products to ensure they live up to the quality and performance you have come to expect!

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