Cal speed installed a procharger on my 392 hemi Yellow Jacket. They are a direct supplier so their price was better than anyone else. I gained 220 horsepower and it's such a clean install read more

Cal Speed & Performance - 392 hemi with procharger - Auto Customization Near Me - Bakersfield, California

The best custom work for exotic and American muscle cars and custom dyno tunes in the Central Valley. I had a complete off the frame restoration of my 1970 Chevelle and complete rewired to handle my new LS7 441 Stroker making over 800hp and 700tq it took some time but it was well worth the time and money I highly recommended Calspeed's for all of your vehicles including new and old. read more

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Today on 3-27-23 I just had my 2014 Challenger Tuned after all the Mods I have done to it.. WOW Jim just unleashed a BEAST.. I give Jim two thumbs up!! Thanks again Jim! Virgil T. read more

Car dropped a valve and destroyed the motor weeks after I wrote a positive review. Engine builder said they didn't do the cam install correctly. read more

2018 Shelby 350GT. Whipple supercharger installed at Whipple in Fresno. Dyno'ed there at 737whp. After a PROPER retune at CalSpeed, received a dyno of 838whp! Wow, Jim just hooked me up. Decided to go w him for x-pipe exhaust and kook headers per his suggestion for additional hp and performance. Installed wo issue (besides cali's distaste for all that is cool regarding header shipment) and happy w results. Re-dyno'ed at 862whp! There's no better place in CenCal for high grade American muscle after market boosts than CalSpeed. Trust me. read more

Cal Speed & Performance - Auto Customization Near Me - Bakersfield, California

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Great shop! Had a cam and all the upgrades installed on my G8, car runs GREAT!! Professional shop doing doing great work!! All of the guys are great! Def. the only BEST shop around!! read more

Had some gearing work done at a local shop, needed a tune asap. Jim got me in, got it done quick. Showed me what he did, picked up 26HP in just tuning. I saw his interaction with another customer, seemed like they do care. I'll be using Calspeed for more work. read more

Jim has saved me money over the years. He has great knowledge of his profession and the industry. I have a 2004 z06 corvette that Jim has been taking care of since 2009 when I bought it and needed the clutch line bled. Most people have moved on to newer cars. I can keep this thing on the road still because Jim and his crew take good care of it. They've done the master cylinder, clutch, slave cylinder, transmission, motor swap when the old one gave out, exhaust. I've been satisfied with their work. I hope their shop continues to do well. I've been to other shops that change you an arm and both legs. That's not these guys. They do very good work at a fair price. Thanks calspeed read more

I took my 72 camaro to Jim last october to change my 4l60e transmission to a new gm performance 4l70e with a torque converter suggested by Jim. The 4l60e was older than my newer 5.3 ls type engine and required an offboard computer which was not performing the way i wanted. After fighting with the wiring that had been hacked up since 1972 We decided to rewire the entire system including my led underdash lights and underhood lighting as well as power seats, cruise control , power windows, power door locks, alarm, etc. At this point Jim suggested we go one step further and really clean up the engine bay and hide all the wires and hoses under the inner fenders .At this point Jim suggested We should have the engine bay painted. I decided at this point to go full bore and change the power plant to a GM performance crate 6.2 ls with a hot cam. Jim also changed the wiper system to a raingear 2 speed system with delay. We also changed the factory air to vintage air freeing up space on the firewall. Jim changed the inner fenders as the old ones would have taken more labor to fix than they were worth.Am i happy with the outcome? Most definitely YES!! I'm extremely happy with the quality of work that Jim and David did The engine has been tuned to perfection and performs beyond my expectations. The job took Longer than expected but I learned that meticulous quality work is better not rushed. read more

Staff are very friendly and patient. They got the job done timely and appreciated the needs of the customer, saw that they were met. Vehicle runs great right now after their tune. read more

I called and spoke with Jim and he let me know when I could bring my truck in for some computer program adjustments. I showed up and had the opportunity to listen as he talked to the customer in front of me. I was highly impressed with his level of knowledge and expertise not only in prices of services but with information that would benefit the customer that he didn't know to consider. When he finished and it was my turn he immediately went out to my truck and did the adjustments and calibration for me. My truck runs better and smoother than ever before! I wish there were more than 5 stars available. read more

I took my 2005 Chevy Silverado SS to Jim and asked for a quote to either purchase and install a high performance crate engine, rebuild my engine, or build an engine and install it into my truck. Jim said he would have a quote with pricing for all three options in a few days. After waiting a week I called to find the status and Jim said he had been in an accident and he would have the quote the following day. After waiting another week I called and Jim promised to have the quote that night. After waiting one more week I called and got the same tired excuses. This went on for weeks and I have yet to receive a quote or even an apology. I have since moved on - so unprofessional. I am glad I found out before entering into an actual business arrangement read more

Dyno tune on my Camaro after some upgrades. Awesome tune for my LS3, Friendly service from stand-up fellas, reasonable prices. Would definitely recommend! read more

Best performance shop in California, reasonable prices, honest trustworthy owner . Friendly staff all of the work is always completed in a timely professional manor. read more

The day was less than perfect but I couldn't be happier with my experience at Cal Speed. Hats off to Jim for handling business the way he does. They came highly recommended and I wanted to make sure everything was right on my build so I took the day off of work and made the 3 hour drive to Bakersfield to get my 74 F100 dyno tuned at Cal Speed. All in all it was well worth it. Not only did Jim help get it running as it should, he taught me the basics as he went along. It was so refreshing to have a shop that was so hands on and passionate about what they do. All of the employees are gear heads and it shows. Jim even stayed late to get me on the dyno and helped get me loaded back on the trailer after my starter died. Top notch service all around. Thank you Jim! read more

I have been to 3 shops trying to dyno tune our LS race truck. Jim is the only one that got it to its MAX HP all the way to redline. My experience with this shop is EXCELLENT!!! I have referred several racers to Jims shop and they have all called and thanked me. You get what you pay for here!!! Thanks Jim DeBerti read more

Very bad experience with calspeed & performance. I had Jim dynotune a 2005 Silverado with a aftermarket camshaft and other performance parts. The truck felt like it would bog out midrange and get very heavy. I had another local shop check my truck and tube and it had bunch of monitors deleted and fuel was maxed out. I am glad the other shop found the problem and truck runs much better now. read more

If your not spending enough money, the job is meaningless to them. Unless you are dropping a ton of money they throw in whatever you ask for and get it out of their shop. If it's a simple job I guess it's a waste of their time. read more