Waste of money
I am very disappointed with this product. I installed it on my 2009 Chevy Colorado 5 cylinder. The website indicates that once installed there will be a whistle produced by the TBS along with a bit of power. I can feel a very slight increase in power but ZERO whistle , which is the main reason for me installing the TBS. I am not sure if it because i have a 5 cylinder or not but every 8 cylinder i have ever heard with a TBS have a very distinct whistle.