PPI is proud to announce our patent pending injector bore repair kit for BMW engines.

Please make sure to use the drop down menu and select your correct engine or we will ship a N54 kit by default. It is a different repair sleeve for each engine and a N55 kit will not interchange with a N54 kit.

We have also added a repair shop starter kit as many of you shop owners have asked for. It will come with 16 sleeves and covers all engines listed in the drop down menu.

Kits include only the following, correct drill bit, correct tap matched to our sleeve, repair sleeves, drill guide, and an air hose to blow out combustion chamber to ensure no shavings made its way into the cylinder and if so, this will blow them out.

A customer made a nice DIY video which can be found here.

https://youtu.be/ajzUH0b71gQ

Disclaimer: this kit is to be used to fix a ovaled or worn out injector bore in the head as a chance to keep from having to replace the engine or cylinder head. This kit involves drilling and tapping the injector bore hole. By installing this kit you do so at your own risk. If you are not comfortable doing this we strongly advise having a shop do this. It is typically 1-2 hours labor time.

This item will have no warranty. As it is a repair kit that the end user installs, we give no warranty. Use at your own risk. It is to be used as a last resort to keep you from having to replace your cylinder head from a damaged injector bore. PPI makes no warranty on the product and are not responsible for improper install or damage to vehicle or body. Use at your own risk.

11 Reviews Hide Reviews Show Reviews

5
Injector fix

Posted by Andy on Dec 11th 2021

Had a misfire I could not fix on cylinder 6. I replaced coil, plug, and injector. Anything over 8 psi and I would misfire. Tuned on mhd stage 2+. Turned out my injector was loose. Really loose. I tried new seal, Teflon tape. More Teflon tape, diesel injector copper washer, cut off oem injector cap trick. The injector cap trick worked for 2 days. Then came loose again and broke hold down clamp for injector on 6. I was ready to sell the car until I saw this fix on a YouTube video. Well it’s been 2 weeks. Not one issue on 18 psi every day! I was seriously ready to sell my car. I didn’t want to pull the engine. Thanks for the great fix.
5
Great fix! Even an upgrade

Posted by Ala Saleh on Dec 11th 2021

This is an amazing fix or even an upgrade to the injectors bore. It is a very easy simple job. Don’t need to take the head of the car. Have been using it on my car which I daily drive without any issues. Completely fixed the misfire I had. If you guys have the same issue go ahead and order it! Watch the video I made for installation: https://youtu.be/vmoA9pina0A