a week ago
Ordered a Fa20 short block recently and have been super happy with the results! The staff was great with quick responses and were able to put me on the right track for my build. With the quality and price of their products you really can’t go wrong here!
- Christian B
a month ago
Absolutely awesome staff and unbeatable prices. They were able to get me the parts I needed for my rebuild during the holiday season and get it out in a very timely manner. Definitely a lifelong customer!
a month ago
Purchased an upgraded stage 1 long block about a year ago. Currently pushing 430whp and 8,000 miles + into the motor. Built this motor for racing at the track and have done just that! Excellent customer service with some of the best build qualities out there. If anyone was looking into GCH for a motor I'd highly recommend it!
- Jordan G

Custom Subaru Machine Shop

With more than 45 years of experience here at GCH we specialize in Subaru, we are not a facility, we are a 2nd & 3rd Generation Custom Machine Shop. We machine and build custom builds or stage up packages or just short blocks or just heads. We cater to each of our customers needs. High performance machining available in house. 

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  • (909) 212-3843


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152 San Lorenzo Street
Pomona, CA 91766
United States

Business Hours

Mon:9:00 AM – 6:00 PM
Tue:9:00 AM – 6:00 PM
Wed:9:00 AM – 6:00 PM
Thu:9:00 AM – 6:00 PM
Fri:9:00 AM – 6:00 PM
Sat:9:00 AM – 6:00 PM
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