Anyone considering an EFI system should look no further than EFI System Pro. Pricing is right in line with all the major retailers, but what sets EFI System Pro apart is the second-to-none before and after sales support.My install went very well and I only had a few hiccups, this is in large part due to the pre-sale support I got from Chris. The minor issues I had afterwards were quickly taken care of because of the quick and correct responses I got when I needed a few questions answered after the install.I cant say enough good things about EFI System Pro, my experience with them has made the whole LS Swap/EFI conversion process the best mod Ive ever done on any vehicle.

The part I ordered for my Sniper EFI really made the car much easier to drive and actually exceeded my expectations in driveability. Needs to be included in every Sniper EFI installation.

I ordered the adjustable Sniper Progressive Linkage Kit for use with my Holley Sniper 550-510 EFI. Fast shipping! The linkage worked great. I was able to easily adjust to the 40% throttle without having to bend around on a link like you have to with the non adjustable type. Worth the extra $$ in my opinion. It made my Sniper much more drivable. No more drag strip launches at every stop I leave from. Works like a daily driver should. Would definitely recommend to anyone using this EFI in a street application daily driver. It also got rid of an obnoxious whistle at mid throttle that I had before with all the throttle plates opening at the same rate.Very Happy with the upgrade! 😎

I ordered and installed an EFI system from them. The whole process was enjoyable. The staff from sales to Tech. support was an absolutely wonderful. I am happy to have found a company that is as dedicated as they are to customer service. Without any doubt I will use them for all my future EFI needs.

The parts are great to upgrade an old car to new technology. The instructions could be a little clearer, however anything I cant solve EFI Pro has had all the answers. So-so parts backed by a great supplier.

Even though I did not buy my Sniper from Chris as I did not know him at the time he has been super helpful every time I had a question. Since I have learned of his business I have purchased everything else from him when I needed them and will continue to do so. Keep up the great work Chris.

Awesome place to get Holley EFI stuff. Easy to navigate website, awesome prices, excellent customer support. What else can you ask for!

Great company. Cant say enough about the support from them. Theyre very knowledgeable and get back to you almost immediately.

Great, Great customer service. Owner Chris Myer is unbelievable!!! He answers your emails and phone calls, always has time for you.

Always had nothing but excellent service / pricing / information.

Chris, is great to deal with. I had an O2 sensor fail on a Sat. morning. Called him and he helped me out immediately. Always responds to emails quickly.I wont buy from anyone else.

I am so pleased I purchased my Holley Sniper through EFI System Pro. It is great to have support that exceeds expectations by providing so much additional information and whatever you need to make your project a success.

Chris and team are the best place to buy these kits. They have the expertise, the pricing, and the community to make the install as smooth as possible.

Chris and the guys at EFI System Pro are simply top notch! Literally the best customer service in the business to go along with easy ordering and good pricing.

Havent installed the Holley Stealth Sniper yet but, so far, EFI System Pro has been very helpful with the ordering process and tech advice. Looking forward to getting it on the road!

Ordered the throttle linkage extension and what a difference very easy to install and works great, now all I have to do is get the EFI to idle correctly.

Very knowledgeable and responsive. A good service to have for aftermarket EFI, which isnt as plug-n-play as some might imagine.

Excellent people to deal with. Saved me money by telling me what I needed. Did not try to upsell a product I didn’t want nor need.

Fast service wish i knew about you before i got my sniper system love my dash unit

The support you get from EFI System Pro before and after the sale are unbeatable! The couple bucks you may save by purchasing anyplace else will not come close to making up for the service and support you get from EFI System Pro.

Best customer service in the industry! The service after the sale is excellent!

Very knowledgeable quick with the response and always eager to help

Incredibly helpful with my purchase and questions concerning my transition to an EFI system.

I researched and found what I needed for a fuel pump replacement/upgrade. It was promptly shipped and received. This upgrade was for a 93 TBI setup and all parts fit and connected up just like EFI System said it would without a hitch. I went from 9psi deadhead test pressure to 100psi deadhead test pressure with zero issues during installation. Installed the adjustable pressure regulator and adjusted it to desired pressure and running like a champ again.

Incredible service- they respond really quickly to questions. And it’s so rare to find people that care about customers these days!! Clearly these guys do! Simply awesome!

Fast, friendly service, will order from them again.

Bought a Sniper X-Flow with ALL related ignition including distributor, coil, also fuel Tank with 340 lph pump, fittings, fuel line etc.. These guys had this to my house in 3 days everything in stock and the technical support is the best you will find. Buy the system, Chris is married to it as much as you are.. Great Job guys ! Your Holley knowledge is awesome !

As always the crew at EFI System Pro came through for me. I bought a Dominator ECU @ a great price but they didnt have inventory so they bought 1 from another vendor to get me back up and running.Thank you very much.

I had a couple questions about building my first EFI system & wiring harness for my first LS build. Chris was great about listing to what I was looking for and making a solid recommendation which I went with. Great experience and I would definitely recommend them!

The part we ordered worked perfectly and sorted out the issue we were having for a great price. We now can enjoy our Chevelle with it running so much better. So thankful for these guys and their parts!!

Great products, great customer support. Love the free shipping. Advice from Chris is really good. Thanks!

EFI System Pro had everything I needed for my EFI upgrade. Pricing was reasonable, shipping was prompt and Chris helped me with a wiring question during my install. The Tech Tips and discussions are also great!

Purchased a Sniper setup couple years ago and some items since then. The support after purchase has been the Best. Its no doubt Chris cares about his customers.

Shipping of ordered products was quick and well packed...had some question on my system and they were quick to respond helping me out..thanks so much

Very happy with deal I got. Chris looked out for me with the small details for my sniper stealth. Can’t wait to get it installed

I am in the process of having my Holley Sniper EFI tuned by EFI System Pro and Nick Langen. Thus far the communication has been excellent, the service is great and thus far Nick has the engine running better and better. The tuning service is a great product and I cant wait to see how well things are running once hes all done.

Absolutely wonderful experience !Saved almost $100 on my wideband 02 sensor, got it Super quick, instant and knowledgeable tech, service cannot be better......thanks for the great experience

I cant say Thank You enough. From a working Sniper to not working with Hyperspark setup, we concurred. With the tools and knowledge I had, the little tips of expert advice dialed me in on what it was going to take to get everything working again. Chris really got me on the right track and we got my Ole 62 C10 back on the road. Fantastic help and expert knowledge truely helped me over a hump I could not see. Thank you again.

Excellent product at a reasonable price. Lightning fast shipping to Canada at a fair price! Will buy from again!

Great content for a new EFI user!

Very Quick Shipping & Help Guides Have Been Invaluable For Setting Up My Holley Sniper. Great Company!

Made a small purchase ($50) and treated me like I was spending thousands. Great communication. Certainly going to use again.

Great product great price and fast shipping thank you very much

Great people to buy from!

Above and beyond...and thats after the sell.Great company

Awesome customer service and a great selection of fueling parts for your hot rod!

Excellent customer service

Fast shipping!

Speed n Service at the same time ... :)

Items are competitvely priced and shipped promptly.

Excellent service!!!

Went above and beyond to solve a problem that was entirely my fault.

Fast shipping and excellent product