EFI Specialties LLC

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EFI Specialties LLC Specialists in modern EFI systems, forced induction, and performance engine tuning. Located in Fredericksburg, Virginia. We specialize in EFI systems tuning.

Record breaking performance with 10+ Years Tuning Experience, 10+ years Mitsubishi experience & the most knowledgable and experienced LX/Hemi Platform Tuner in the Industry for 6+ years. Our primary market is Mitsubishi and Mopar/Chrysler/SRT (From modern Hemi to Viper to SRT4) tuning, however GM, Ford, Toyota, Subaru, and all other makes and models are tunable as well. Our customers have vehicles ranging from 7 second drag cars to 1000+ horsepower daily driven street vehicles. We can tune everything from piggyback systems to full standalone systems and flash systems, including but not limited to AEM EMS, Diablosport CMR, ECMlink/DSMlink, ECUFlash, HPtuners and more. Please inquire about your vehicle if you're not sure what you need, have, or if we can do it. We can help you. Also Available: Parts installation, general troubleshooting, and Mitsubishi transmission service, as well as Mitsubishi ECU/TCU socketing and chipping services are available as well. Consultations for help planning out your race car build, or sorting out a build in progress are welcome as well. Contact for more information

Its been a while, we stay pretty busy and forget to post to let folks know we are still alive and kicking on Facebook! I...
09/24/2026

Its been a while, we stay pretty busy and forget to post to let folks know we are still alive and kicking on Facebook!

I wanted to let some folks know that we added ported heads to Macks SBE 6.4, its stock compression still, picked up some great power over all, 94Ā° in the shop! We did one pull to verify afr and all that jazz was in check and saw 603whp and were pleasantly surprised! Especially since the car was around 420whp stock on a hard tire, we dyno on the drag radials oh and we're running the MRHv2 blower cam in this car.. same one as in Modern red hemis mid 8 second d1x daily driver!

The goals was to see how far it would NA throughout all the stages and how fast it would go at the track in all weather and all forms, we'll finally be hitting the track in some hopefully good air starting Oct 25th for the Stay tuned down and dirty drag and drive in drag and drive trim, cars been signed up for the 10.0 class. If youd like to check the event schedule and pop in to supporter the event, that would be awesome! Mack will be there with his better half.

Im going to add a link to the only video we have of the car doing a pull and dyno for those interested, sorry we're so bad with social media over here šŸ¤£https://www.instagram.com/reel/DdJTMo8Ovfb/?stkn=MTJicGd6bXVvNDI0Mw==

TNT Tuesday? Always fun getting out to the track to get things dialed and learn something new! Sumerduck Motorsports Par...
05/12/2026

TNT Tuesday? Always fun getting out to the track to get things dialed and learn something new! Sumerduck Motorsports Park

04/24/2026

Just something to end the week off nice, Hellcat with out in house cam package, engine has been built using MMX drop rod and pistons with MMX billet mains, arp hardware throughout, short block was machined and assembled locally, transmission has a stage two applied torque solutions kit built in house. Ported 2.4 blower, also done in house. Car dynoed 581whp stock on the stock hard tire, makes 925whp now on 17psi now on the 315 ET streets. Next will be some testing and eventually a bigger blower now that shes prepped!

Early morning test drive, customer complained of the way the car drove initially. Now with another 60whp after tuning an...
03/06/2026

Early morning test drive, customer complained of the way the car drove initially. Now with another 60whp after tuning and fixing some things she drives pretty dang nice! Shes got a 6.1 hemi swap to a 4 speed in one of the best colors mopar ever made!

02/16/2026

Idle clip and dyno numbers from one of our V3 cam packages/supporting mods.

02/16/2026

I forgot to update, so long story short, day 1 was solid.. we left the car heavy and it spun a little and still went a bottom 10.. next day we got a high 10 and it was down 10mph.. so I did some investigating and it turns out the secondary TB wasnt opening all the way. We got it to work about 60% on the 3rd day and made a decent pass full weight.. but when it was all said it and done it was hit or miss, decided to just have fun and not worry about the times. Ended the week with a mid 10 second average. Car drove 750 miles down and then 750 back without issues.. we lost one coil pack on the last day.. did alot of side missions, met alot of cool folks.. Florida people are awesome! Sick week was better than expected! Over 3000 miles total on the car and we are in one piece and will work out the issue and hit the track again soon! Until then check out the in car we got from a cool dude on the trip.. it was the green wagon if yall followed along.

Apparently the folks at 1320Video.com clean their lens when they take pics, i could never get this shot! We are still ou...
02/05/2026

Apparently the folks at 1320Video.com clean their lens when they take pics, i could never get this shot! We are still out here! Bradenton tomorrow!

Sorry for the greasy pic! Just thought it still looked kind of mean on the dyno! She made 575whp as is, cars normally on...
01/31/2026

Sorry for the greasy pic! Just thought it still looked kind of mean on the dyno! She made 575whp as is, cars normally on a lighter wheel.. but due to snow and ice we couldn't really dyno on them, this set up added about 8% more fuel than the single 108mm sheare fab lid set up.. they both put down the same power, this just did it on a heavier wheel and asked for more fuel to do it.. that tells me we should see some much improved track times.. to put the power into perspective.. we're at stock hellcat power when it comes to this dyno. Not bad for a cam only 6.4 with a crazy intake and some headers.. ported heads should wake it up a hair more too! Off to sick week now!

From concept to reality, its going to be interesting to see how this performs not only on the dyno; but also on track du...
01/29/2026

From concept to reality, its going to be interesting to see how this performs not only on the dyno; but also on track during sick week.. something about the old school vibes with a new school car just makes me happy.. ill post some dyno numbers and track times and videos if yall dont leave me hanging in my excitement..

01/20/2026

Anyone else going to be attending Sick Week this year? We'll be running the NA small block Heavy metal class ourselves!

Address

75 Potomac Creek Drive Unit 101
Fredericksburg, VA
22405

Telephone

+15409035652

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