ICT BilletDuramax Turbo Diesel 2004.5-10 LBZ LLY LMM Mouth Piece Resonator Noise Reduction Plug Cover Cap 6.6L Seal Billet Aluminum Made in America ICT Billet 551503

Great quality. Plug fits perfectly. Worth the money

This product was easy to buy and easy to install would buy again

This is more a decorative item then anything else. It allows you to eliminate the resonator. In some of my research of Duramax diesel LLY engines I find it was no uncommon for the resonator to break apart and pieces were drawn into the engine via the turbo. This will cause some serious engine damage. So in my mind it's cheap protection in case the resonator did start breaking up. I would recommend applying some grease or oil to the rubber "O" rings to make it easier to install. Since purchasing the plug I have replaced the turbo mouth piece and don't need the plug anymore.

A little grease and tap it with a rubber or wood mallet and that’s it.. I did notice getting an extra mile to the gallon!!!!:)

Very nice unit and great tight fit...... just a little lube and some pressure and I was able to work it into place. Good TIGHT fit which is exactly what you want!!! Perfect!!!!

this will work great after my complete deleting on EGR system on my LLY

Fit my 2004.5 LLY perfectly. Make sure and lube the o-rings before installing them and then lube the plug to make easier installation and not tear the rings. Very pleased and looks nice and clean under the hood.

It looks good and easy to install

Fit just like the description, easy install on my 2008 LMM Duramax.

Very easy to install

Fit perfectly on my 06 lbz

Perfect fit for my LBZ

Worked fine