Incredible and personal. When somebody wants your business so that you come back to them this is the shop he has so much integrity. His technicians really know their stuff. They listen to what you want and help you figure out what you should get thats what I love about the most.

Thank you Kushan, Z Sin is running great..

These guys are the real deal. Made an appointment to replace my LS1 harmonic balancer. They jumped on it and got it done. They also did a tune and found my car was running lean. Now I feel much better about its long term reliability. I highly recommend Excelsior Motorsports!

Kushan, the owner, has many years of experience building LS engines. His knowledge is track-proven, and he made me feel welcomed within the first minutes of entering his shop. I will absolutely be giving my business to Excelsior in the future.

TAKE YOUR VETTE SOMEWHERE ELSE!!!Kushawn hires sub par mechanics to complete easy jobs. When I took my vette to another shop, they pointed out my brake pads were installed the wrong way, along with other shoddy work where corners were cut. I could go on and on about how he couldnt diagnose an easy oil leak, and decided to only change one oil pan instead of both... the list goes on and on. Spend thousands just to re spend thousands because of the poor attention to my car and details. Ask him how many mechanics hes let go in the past couple years.

I worked here for the better part of three years. Kushan is a great guy and I had a an awesome time learning from him If anyone is hesitant on having their LS car servuced hete,dont be. I assure you we treat everyonescar like our own.

Its my home away from home! Awesome staff and everyone is super friendly! Fun spot!

Took my 2002 z28 in for a retune after having had issues with my old tune. The guys there were very helpful amd even gave me some advice prior to taking my car in. Had a few hiccups but was on me not on them. At the end the car got done and drives solid and has very good manners. Will definitely go back with future projects. Anyone looking for an ls tuner, this is the guy.

Customer service was outstanding

Kushan is the best tuner for Camaro and Corvettes.I have a 2017 Camaro Procharged P1X that was tuned by Cunningham Motorsports. Come to find out Ryne Cunningham had no idea how to tune these direct injection LT1 or LT4 Engines. My car was fouling plugs and misfiring. Kushan not only made my tune great, he also added another 55whp and 60 foot pounds torque to the freaking wheels!! Kushan is amazing and cant reccommend him enough!!!

They treated us like family and the guys are very professional. Always honest Im very impressed, will use this place for all my Corvette needs.

Fantastic experience at Excelsior. My GTO has never performed so well while maintaining perfect drivability. Extra time was taken to insure everything I needed was handled. If youre looking for a fantastic tune, a great shop, and some excellent racing stories this is the place.

Take your GM vehicle here if you want the best service, engineering and parts money can buy. Kushan knows his stuff!

Fellow C7 Owners,Are you having problems with your transmission overheating? Are you looking to upgrade your Corvette?Look no further then Kushan at Excelsior Motorsports in Escondido!Quick background. I have a 2015 Black Z51 Convertible automatic that would overheat on the track after 3 hard laps and was looking to do extensive upgrades it as well. So after exhaustive research online and locally, I found a corvette guru, Kushan Peykarian.As a doctor, I work with professionals on a daily basis, so I know when I’m working with a consummate pro. Kushan is not only gifted and talented as a technician but also a man with the highest integrity. I completely trust him and his word is his bond. He not only met but far exceeded my expectations!! He is an absolute master of Corvettes! He is so skilled and accomplished because he owns, tracks and tunes his own C7 Z06 (and all vettes)! During our initial conversations, what set him apart from others in my mind was his absolute passion for these cars! I could feel his enthusiasm exuding over the phone! Kushan is a brilliant communicator as well. Throughout the project (below is the details of what was done), he kept me up-to-date and appraised of how progress was moving and with an extensive project such as mine there are always challenges. However, what is most important is how those challenges are met! This is when Kushan is at his best! He is up for any challenge! He ALWAYS found solutions! And Kushan’s knowledge and attention to detail!! OMG! He went through my car from front to back and top to bottom to ensure every nut and bolt was tightened and the car met his impeccable standard!The upgrades included a complete new cooling system for the engine, transmission and rear differential. An aero package with a new front splitter, side skirts and rear wing was added. EDC suspension with upgraded leaf springs, ball bearing steering, race seats, upgraded brakes, fitted for 10% wider tires for mechanical grip, and a motor upgrade with 35% more horsepower in a normal aspirated engine.The results on the track.Even with a 35% increase in horsepower, my transmission runs 30-40 degrees cooler. I can run the entire session full speed and my car never goes into “limp” mode nor alarms going off. I have shaved 10 seconds off my average lap time on a 2.49 mile road course. The car is smooth, stable, accelerates with passion, stops on a dime and frankly sounds and performs BADASS! I absolutely love this car!!In short, if you are looking to modify your Vette, reach out to Kushan! Tell him what you want, your budget and step back and let this genius create a masterpiece. My car is Kushan’s Opus i.e. an accumulation of his impressive knowledge of corvettes over the past 2 decades!!8 Month UpdateAfter 20 track days, my car is running as fast, cool and smoothly as the first day it arrived back to me! It still sounds and performs like a bad ass! Frankly, I am still growing as a driver to reach its full potential. Kushans upgrades have allowed me to shave 14 seconds off my previous best lap times. More importantly, it NEVER overheats!!! Unlike before, it would overheat in 40 degree weather after 2 hard laps. My car is a convertible...just think would he could do with your coupeIf you want your car done right the first time, Kushan is the person to talk to!…Read more

I spoke with Kushan for several weeks prior to getting work done on my vehicle. He took the time to explain how he approaches his work and was very helpful and informative. When it came time to have the work performed it was done in a timely manner and was top notch. My car performs better than ever and I know if I have any questions or need follow up Kushan will not hesitate to stand by his work. Highly recommended for Camaro performance upgrades.

About a year and half ago I took my project truck to Excelsior based of word of mouth. The truck is a LS2 swapped Tacoma used for drifting and it had a few teething bugs related to the tune loaded by another company. Im a mechanic by trade and have a hard time trusting anyone with my truck. I explained to him that I dont care about that extra 5whp, Id rather it be able to survive the onslaught of torture I was gonna a put it through. Not only did Kushan get the bugs ironed out, he worked with me around my schedule, explained to me what he was doing and why and addressed all of my concerns. My truck came back to me running amazing. While I dont have a before dyno (tune was unsafe to dyno), the numbers were too be expected. Since then the truck has been to dozens of drift events (some track Temps were ~120*s) 9k very hard miles, and down the local strip a few times too. Not a single problem. Runs perfect. I plan on returning for retune for new mods in the future!

I need work done ASAP because of some issues that developed I during my roadtrip to California. I had to leave within 3 days so that I could be back in time for work. Kushan Peykarian is the tuner there and he was an absolutely pleasure to deal with. He understood the time-sensitivity of my situation and managed to fit me in ASAP even though they were up to their eyeballs in work already. He completely retuned my 03 Z06 and eliminated the issue I was having. He even called me back a few days later to ensure I had made the return trip safely and that the car was in working order. I cant recommend Excelsior Motorsports or Kushan Peykarian enough! These guys are awesome!

I called three other tuning shops to gauge who would get my business; Excelsior Won. Kushan really knows his stuff!No corners were cut and he really took the time to answer all of my questions and explain what he was doing to my car. Two and a half hours with Kushan was time and money well spent.My Goat is running better than ever and it pulls like a freight train. I just wish Kushan sold discount tires as I have a feeling I will be needing some new rubber pretty soon!

I picked up 2012 CTS-V about a year ago. Car was fantastic, but I soon felt it needed a little more go. I looked around for a tuner that knew LS engines and got lucky when I found Excelsior Motorsports. The owner is Kushan and he is a car guy through and through. My stage one build consisted of LT headers, ID 850 injectors, S/C pulley, ported TB, colder plugs, solid isolator, dual catch cans and professional but sane dyno tune. The work was top notch, reasonably priced and worked magic on the car. Since that time, I have added an upgraded S/C lid with better flow and cooling along with a retune to take full advantage. Kushan also installed a differential cooler earlier this year. It was a beautiful custom job tailored to my coupe that works great at the track! The man knows his stuff, highly recommend.

Ill preface my review with a little personal background. By trade Im an engineer and have a good grasp on the technical side of things. Ive also been wrenching on my personal cars/trucks/motorcycles for over 15yrs. I like to go FAST but only if done safely, reliably, and without breaking the bank (honestly who has the time or money anything otherwise). After messing around with other shops over the years Ive come to same conclusion... most shops have limited knowledge, slap on supposed go fast parts, skip any quality control and charge an arm and a leg. Two months later youre back in the shop wondering why it doesnt work right or why your car is broke. This gets old real fast. This is NOT the case with Excelsior Motorsports. Kushan from Excelsior isnt perfect (who is?!), hes isnt the cheapest nor is he the quickest at getting the work done, but in my opinion hes the BEST in So Cal (and by a large margin) for LS engine/GM chassis work. Whether you road race, autocross, drag race, do top speed runs, or just like playing on the street hes got you covered. Yup you heard right... he knows brakes, suspension, aero, engine, drivetrain, safety, chassis tuning.. etc, Next time you talk to some so called expert shop, ask them if theyve ever installed a rear diffuser or re-valved triple coilovers or built a custom roll cage or even done a corner balance... Kushan has and more! Kushan will always take the time to talk things out and determine what is best for you and your car. Hell also to get as technical as you need (which I love and to be frank most shops dont know what the hell theyre talking about). If he doesnt have an immediate answer for you (which he usually does) hell contact a vendor and do some research and get back to you. He takes a lot of pride in his work, is exceptionally knowledgeable, has remained humble with his success and personally makes sure your car is done right or it wont leave the shop. Next time consult with a real expert that cares about his work... Kushan @ Excelsior Motorsports.

Thanks kushon..i have a 04 z06 corvette at present...i have owned at least 5 z06s c6 and c5s..Kushon did a great job on my 04z..all i have is a halltech filter and screen, the rest of the car is totally stock...With his tune i picked up almost 35 rwhp...great improvement...Over a yr ago, Kushon, tuned an 09 c6 that i had with a complete c6 Z06 exhaust system...it was a fantastic improvement..Kushon, went out of his way, to work me in his schedule..and was very through in the tune and sevice..thanks again,bud miller

My son used Excelsior Motorsports to rebuild the top end of his 98 Z28 LS1 motor. New CNC heads,cam lifters,injectors,intake,throttle body,long tube headers and all new Stainless Exhaust to the rear. The car ran very strong.Kushan does excellent work.My son joined the Army. His car sat in our garage for almost six months. After all his training was done,he wanted to take his car back to Fort Riley KS. Back at base theres no warm garage and there winters are harsh.I called up Kushan to retune/reprogram the car for the KS weather. Again Kushan worked his magic, car running great.I know if my son was here today he would agree with my statement. The reason my son isnt writing this review, he passed away while serving our great nation as a US Army Cavalry Scout.

Kushan is excellent