John A. Marker

I met Tom thru this Forum about 10-12 years ago looking for someone that could tune a C4. I was new to Corvettes, but not SB Chevy engines. He had always been up front with me in his advice. Based on his recommendations I built my ZZ4 from the bare block up purchasing may parts from him. I drove the 11 hours from the SF Bay area to have him tune the car.

I moved up to a C6 recently. Tom asked if I was going to mod it. I replied, no I am happy with the stock 400 HP. Well that didn't last long . California is a PITA as far as SMOG is concerned so you have to be careful with what ever you do. I added a FAST 102 intake and Tom pulled the old stock exhaust manifold and replaced it with a ZO6 manifold, cats and 3" pipe about half way back were we necked it down to join the Bolra that was on the car. Then he performed his magic. No this car is not putting down the 600-900 HP that some of you are getting, but I am happy. The tune itself is like driving a different car.

Short video of the event.....