I have been asked this question several times and am kinda emabarrased to say I don't know especially since the exhaust is on MY truck, so I am reaching out to you the Old Skool guys togive me a little insight. Where did it originate ? What do you call the style ? I know,, I'm layin it out there to get some weird answers, But I'm sure somebody out there knows the story.............. Check it out.