2duff...funny...I had a Stebro on my 69 Triumph Spitfire! Yes, Dan is a great guy. They have people who want to ask me about the system, but no one ever actually calls. I am more than willing to talk to anyone who wants more information. Send a PM and I'll give anyone my phone number.
A member from New Jersey was supposed to call last week, but never did.
There is a definite drone inside the cabin while driving. It did take a while for me to get used to it, and of course my neighbours have made some comments about the noise!
Start up, with a cold engine, is a bit loud, but it smooths out when the engine warms up. My wife loves the sound of her car and mine, but complains how our brass wall attachments vibrate in the living room when the cars are started in the garage!!
As soon as you hit the gas, the exhaust note changes from a drone to a sweet F1 sound. There are no valves in a Stebro system.
Stebro has been around for more than 50 years. The originals owners (Austrian and British) started the company to finance the Austrian's F1 racing costs in the 50's & 60's! The company disappeared from performance exhaust market in the 80's, as they had a contract to supply exhaust systems to all Canadian military vehicles for 17 years. Now you know why some military trucks were so loud! They just got back into this market about 5 years ago, but didn't really do much until the past 2 years. They now want to get their name out there again.
They even design and fabricate systems for antiques. I saw one on the showroom floor for a 1930's saloon-type car (can't remember the name), that was being shipped to California.
Vlad is their main designer/installer/test driver. He is a great guy too.
They feel that their main competition (sound wise) is Tubi, but, at their prices, I would only get the Stebro ($2500) for an E60 M5, including a lifetime warranty!