Mantapart is a small race shop that concentrates mainly on 4 cylinders and lighter cars. As you can see from their home page, they prep and race cars in the Grand Am Cup Road Racing Series.
Like most private race shops, they are fairly small and concentrate most of their efforts on competition. Their retail side helps to fund the racing efforts, so their prices are a bit higher than most and their turnaround times can be very lengthy. Also, don't expect customer service like from PFYC or other retail-only merchants.
That said, they do make very good parts but prepare to wait for them.
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