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The Genesis G70 might wear a luxury badge, but don’t let that fool you. It is one of the most underrated performance platforms on the market today. Under the hood sits a 3.3-liter twin-turbocharged V6 pushing out around 370 horsepower from the factory, which translates to about 300–320 horsepower at the wheels. Respectable numbers, sure. But with the right Genesis G70 mods, this engine becomes a daily drivable, reliable monster.
Thanks to its strong internals, the 3.3L T-GDI V6 is built to take abuse. The fueling system and stock turbos can support up to roughly 500 WHP, while the engine itself is proven to handle as much as 800 WHP on stock internals. That means you don't need to crack open the block unless you’re gunning for a full-blown race build. With a smart selection of bolt-on Genesis G70 upgrades, you can turn your daily into a 500 WHP street weapon without sacrificing reliability.
Spark Plugs to Eliminate Misfires
Before throwing boost and tuning into the mix, make sure your spark plugs can keep up. Stock plugs tend to misfire once you raise the power. For builds around 500 WHP, one-step colder plugs are the go-to. If you’re aiming past 500 WHP, step up to two-step colder ones. Not exactly a flashy mod, but absolutely essential if you don’t want to chase misfires down the road.
ECU Tuning for the Biggest Gain
This is where things get fun. An ECU tune alone can unlock 80-90 WHP and over 100 lb-ft of torque. Beyond the raw power, tuning is what ties all other upgrades together. By raising boost pressure and optimizing fueling, it maximizes every supporting mod you add later. Think of it as the foundation for the entire build.
Cold Air Intake to Feed Dense Air In
With more boost comes the need for more air. A cold air intake kit feeds the turbos the oxygen they’re starving for, improving throttle response, turbo spool, and efficiency. On the dyno, you’re looking at an extra 15–25 WHP when paired with tuning. The stock intake is restrictive, so this upgrade is one of the best bang-for-your-buck Genesis G70 mods.
Image: HPS Performance Parts
Upgraded Downpipes: Free Up the Exhaust
The factory downpipes house catalytic converters right next to the turbos, creating back pressure and slowing spool. Upgraded downpipes fix that. Go catless for maximum gains (that’s up to 40 WHP) or opt for high-flow catted downpipes for emissions-friendly driving while still picking up 20+ horsepower at the wheels.
Front Mount Intercooler to Kill Heat Soak
Once you crank up the boost, the stock intercooler starts to struggle. Heat soak robs 20–30 WHP during hard driving, back-to-back pulls, or track sessions. An upgraded front-mount intercooler (FMIC) keeps intake temps in check, ensures consistent performance, and adds around 10 WHP. The real win here is reliability: colder charge temps mean a healthier engine and more consistent power delivery.
Ethanol Fuel: Cheap Power
Want to squeeze the last bit of power out of the stock fueling system? Ethanol blends are the trick. A low E30 mix can give you an extra 20-25 WHP without touching the pumps. Full E85 requires upgraded low- and high-pressure fuel pumps, but it also pushes the ceiling past 600 WHP. For those who want even more without replacing pumps, charge pipe injection can add enough fueling capacity for the added 75-100 WHP.
Control the Power: Supporting Mods
Making 500 WHP is one thing—putting it to the ground and controlling it is another. If you want your G70 to feel planted, predictable, and safe at these power levels, supporting mods are just as important as raw horsepower.
Suspension Upgrades
With more power comes more weight transfer and chassis stress. Coilovers or upgraded shocks and springs will sharpen handling and reduce body roll. A full suspension upgrade with sway bars and strut braces will make the car more confidence-inspiring in corners. A well-tuned suspension setup transforms the G70 from a straight-line bruiser into a true all-around performer.
Image: Yellow Speed Racing
Brake Upgrades
Stopping 500 WHP requires more than factory brakes. Performance pads and rotors are the bare minimum, but a big brake kit will give you the confidence to push hard without fade. Stronger, more consistent braking power also adds to the car’s overall balance, letting you exploit the engine’s potential without fear.
Tires
You can’t make the most of your upgrades if you’re spinning through every gear. A set of high-performance summer tires will drastically improve grip, reduce wheelspin, and let you fully enjoy that boosted horsepower. Think of tires as the final link between your mods and the pavement. They are where all the power meets the road.
Tie Everything Together: Fukin Tuned Throttle Response Controller
No matter how much power your Genesis makes, whether stock or fully modded, the factory drive-by-wire throttle is lazy and laggy. Upgrades and more power do improve the throttle response but that initial delay never really gets eliminated. That’s where the Fukin Tuned throttle response controller comes in.
Fukin Tuned connects directly to your pedal position sensor and modifies the stock signal to eliminate throttle lag. You get four driving modes (Slow, Cruise, Fast, and Send It), each with nine increment levels. That’s 36 unique ways to dial in the pedal response exactly how you like. Whether you’re after razor-sharp throttle response for spirited driving, snappier response on your daily drives, or something smoother for cruising around, Fukin Tuned delivers.
The unit is completely plug-and-play and installs with OEM-quality plugs. All you have to do is to stash the module and pull up your phone to set your throttle response! As a bonus, it features a built-in Anti-Theft feature that adds an extra layer of security to your G70. It is FREE to try, and after the trial expires, it costs $0.99 a month or $9.99 a year.
If you want your Genesis G70 to feel as responsive as it is powerful, Fukin Tuned is a must-have. Grab your Fukin Tuned throttle response controller today and tie all of your upgrades up perfectly for that 500 WHP daily driver!