I bought one to replace a chrome box , it worked ok for a little while

No performance gains, zero ..none, period

Car did not start as well , the tach needle jumped all over

After using it for a few weeks

after the 3rd or 4th run down the track, car would miss stumble, sputter


I hated it , took it off, replaced it with a MSD Street fire box


runs so much better, no misses

but, they did refund me the cost of the box, no tax or shipping but I did get $199.00 back


I would never ever buy another one ,ever