It takes a lifetime to build a reputation and just a minute to destroy it.
I've done business with Pro Systems and give them a huge thumbs up. I don't know the people from Pro-Systems personally, but I can say I've been around the block enough to know people. In my opinion when dealing with Pro Systems vs. most others I'd say Pro Systems is well above average for customer service and doing what they say they're going to do. The product and follow up service I received has been perfect. The detail is also well above average.
I have a Roush 427R in my cobra. The third carburetor I now have on the car came from Pro Systems. It's absolutely night and day better performance over the two previous set ups that I had fiddled with for months to dial in. I told them purpose I had in mind, that being I didn't care about fuel economy, build it fast in a straight line. I told them what engine/set up I had in detail, other than the cam specs Roush declined to give me, and they sent me the carburetor. I bolted it on, took it to the dyno then did a 1/4 mile pass with my G-tech to compare before and after.
Here are the changes I've observed.
It made about 10% more rear wheel HP at the dyno.
It drives better around town.
It instantly hammers when you nail it.
It uses more fuel around town.
Here's the G-tech before and after.
Black - Pro Systems
Red - old carb
