Tuned By Loi

08/27/2026

2018 Lexus LC500
Stock headers
Stock intake system
Army Trix catback exhaust
Full E85

📈 418WHP / 382FTLB TQ - 4th Gear

08/24/2026

2018 LC500 came in for a complete fuel change over and dyno pro-tune on Propel Fuels E85.

Modifications:
Stock intake system
Stock headers
Stock spark plugs
ARMYTRIX Automotive Weaponized full catback exhaust system
E85 fuel

📉 Baseline 91ACN: 374WHP / 332FTLB TQ - 4th Gear
📈 E85 Pro-Tune: 418WHP / 382FTLB TQ - 4th Gear

📈 Final result: 439WHP / 411FTLB TQ - 6th Gear

Complete Remote E-tune Kits are available. For tune inquiries and dyno scheduling please send an email or text the business number.

Dyno locations for in-person dyno tuning with partner performance shops:
📍Santa Clara, California - Four B Auto Performance
📍St. Paul, Minnesota - jwp_automotive
📍Colona, Illinois - Hawk Spec Imports

📧 [email protected]
📱 Text 515-505-3608

08/22/2026

Custom titanium midpipe with z-pipe. Added extra o2 bungs for a dual wideband gauge. Will be doing some dyno testing to see if there are any gains with better exhaust scavenging.

08/13/2026

08/12/2026

OPENPORT 2.0 Based Devices
Please note, due to ongoing compatibility issues with Openport based Drivers, lack of dedicated support from the company, inability to get replacements, and issues with security on these devices, VF Tuner will be phasing out support for these devices by end of 2026.

Unfortunately, devices are now being cloned, and unique serial numbers are at risk.

If you have one of these devices and have not traded in to our new Wiflash device, we will be offering an additional discounted trade in option. We have had this trade-in option for about 3 years, but due to a mandatory phase-out of support, we will be extending it with a smaller trade in cost.

Please note, once the phase out is complete these openport 2.0 based devices will no longer be usable with VF Tuner software.

Thank you for your support.

07/27/2026

2020 Lexus RCF on the Dynojet Research Inc. rollers at Four B Auto Performance getting an ECU and TCU dyno pro-tune.

Vehicle:
2020 Lexus RCF Base with TVD
16K mi
91ACN fuel

Modifications:
NOVEL headers
NOVEL midpipe and full exhaust
GruppeM Inc Cold Air Intake System
HIGHSPARK IGNITIONCOIL JAPAN®︎ Premium coilpacks
FIGS Engineering Radium Engineering®️ oil catch can
VF Tuner software for ECU and TCU control

📉 Baseline: 397WHP / 364FTLB TQ - 4th Gear
📈 Tuned By Loi Pro-Tune: 419WHP / 382FTLB TQ - 4th Gear

For tune inquiries and dyno scheduling please send an email or text the business number.

📧 [email protected]
📱 515-505-3608

Dyno locations:
📍Santa Clara, California
📍Des Moines, Iowa

07/14/2026

2021 Toyota Tundra
Whipple Supercharger
91ACN fuel

📈 437WHP / 481FTLB TQ - 4th Gear

07/14/2026

https://www.facebook.com/marketplace/item/875971425074405/?mibextid=dXMIcH

07/11/2026

2021 Toyota Tundra getting a dyno pro-tune after running the stock tune for the past 3yrs while having a supercharger with larger port injectors. It's highly advised to get a pro-tune after installation of a supercharger kit as the factory calibration runs extremely lean with too much ignition timing that it can cause detonation and serious engine damage.

I datalogged and diagnosed a severe misfire that lead to carbon fouled front o2 sensors, worn spark plugs, and aftermarket injectors that the factory calibration is not scaled for.

Four B Auto Performance performed the pre-dyno inspection. Full compression test, new OEM Denso spark plugs gapped, and replaced with new Denso front o2 sensors.

Modifications:
Whipple Superchargers Tundra 5.7L Gen 6 3.0L Supercharger Kit
DW 650cc Injectors
Upgraded aftermarket in-tank fuel pump
Keith Carty | BAmufflers Dirty Deeds long tube headers
Aftermarket catback exhaust
91ACN fuel

Engine and transmission controlled using VF Tuner software

Wheels and tires:
Fuel Off-Road Wheels Australia
33x12.50R20LT

📈 437WHP / 481FTLB TQ - 4th Gear

Dyno location:
📍Santa Clara, California - Four B Performance

07/10/2026

2020 Lexus GSF came back for dyno tuning at Off The Line Performance to maximize the gains with zero exhaust system restrictions. The last time this GSF was on the dyno it had an electronic exhaust valve stuck closed so it had a massive restriction to exhaust flow which was robbed of response, peak power, and torque.

Modifications:
TOM'S Racing Carbon fiber intake elbow with drop-in air filter
Aftermarket headers
Aftermarket midpipe
Aftermarket axle-back exhaust
93AKI

The aftermarket headers installed on this car is not designed for peak power gains. The headers are fabricated of the highest quality workmanship while designed to produce a very unique and exotic exhaust note.

📉 Baseline: 407WHP / 348FTLB TQ - STD 4th gear
📈 Pro-Tune: 430WHP / 364FTLB TQ - STD 4th gear

Dyno locations:
📍Des Moines, Iowa - Off The Line Performance
📍Santa Clara, California - Four B Auto Performance

For remote tune inquires and dyno scheduling please send an email or text the business number.

📧 [email protected]
📱 Text 515-505-3608

VFTuner VFProTuner