G force motor sports have some quality built V customers check out their builds on instagram
They've always done very solid mechanical work. They did a full engine swap for me and you couldn't tell anything was touched from the factory. I think they take extremely good care of their customer's cars - I've rarely if ever heard of one scratched or damaged while there. They treated my cars really well.
My grief with G-Force arose from lingering issues with my build, despite spending tens of thousands of dollars there. Yes - many tens of thousands. Overall Mike and his crew did an excellent job. But my fuel system swap almost killed me - financially and emotionally. Mike was a roller coaster of emotions and was pretty unprofessional with a few vendors, myself, and some other folks. Then I go to pick up the car and it's like nothing happened. I truly think Mike has a medical/chemical condition that causes him to become very agitated one moment, then calm later on. He really does take pride in his work and his shop guys - but anyone chosing to go there should be absolutely forewarned you may end up bailing yourself out with a huge financial cost or huge inconvenience cost or both if the build does not go smoothly. Mike is not the sort of person who has a lot of patience when time is short and problems are many. That's reasonably - many people aren't. But he's the boss and Internet reputation is a big deal these days.
Even despite my monetary fleecing by G-Force and my substantial build challenges, I wouldn't hesitate to say that for exhaust work they are excellent. Anything more complicated - they can certainly do the mechanical work. Mike tunes well for power and he did a good job with MOST of the daily driver refinements - but trans tuning was a big miss. Be ready to engage an alternate tuner if a build requiring a tune is in your plans....
Of course - all comments with the utmost respect to friends and buddies of Mike and the guys that work there. All this is JMHO and naturally, your experience may be different...