Review on 🛡️ JDMSPEED Black Shield Protective Sleeve by William Mathis

Don't waste your time and money when using headlines. After installing the headers on the first start, I noticed some smoke coming from the engine bay of my 63 Nova. I thought it was just some kind of grease that got on the headers during installation. After about 5 minutes the smoke intensified so I went to see where it was coming from. I immediately noticed that it comes from 4 of these sleeves. All bushings that touched the collector tube were burned out after 5 minutes! I could only imagine what it would do if I took it for a 20 minute ride! Just save yourself the headache and buy a higher quality product the first time.