Which performance accessories are best for the Genesis G70 3.3T Sport?

Question

Hey everyone! I recently joined the Genesis family after picking up a 2023 G70 3.3T Sport Prestige in Siberian Ice. I’ve been driving it for about a month now, and man, that twin-turbo V6 is such a gem. It’s got plenty of punch from the factory, but coming from a background of modified Euro cars, I can’t help but feel like there’s so much more potential waiting to be unlocked.

I’ve spent the last week falling down the rabbit hole of YouTube videos and forum threads, and honestly, it’s a lot to take in. I’m looking to start with some performance accessories that will really wake the car up without making it unbearable for a daily commute. I’m not trying to build a dedicated track monster just yet, but I’d love a bit more intake noise and a more aggressive power delivery.

Right now, I’m leaning towards a few specific items. A lot of people seem to swear by the JB4 tuner as a first step, but I’ve also seen some talk about the EK1 Lite. Along with a tune, I’m looking at the BMS Dual Intake and maybe some upgraded intercooler pipes. One thing I’m particularly curious about is the spark plugs—is it true that I absolutely have to regap or replace them with HKS plugs before doing any tuning, or can the stock ones handle a mild Stage 1 setup for a while?

I’ve got about $1,500 to $2,000 set aside for this first round of upgrades. I really want to prioritize reliability and "bang for your buck" improvements. I'm also slightly worried about heat soak during the summer months, so if there are any cooling accessories you think are essential, please let me know.

For those of you who have already started modding your G70 3.3T, what performance accessories would you consider 'must-haves' for someone just starting out? I'd love to hear what actually made a noticeable difference in your 0-60 times or overall driving feel!

fdstupgkkq · Accepted Answer

Yo! Saw this earlier but just now responding. Congrats on the Siberian Ice G70, that color is *fire*. > One thing I’m particularly curious about is the spark plugs—is it true that I absolutely have to regap or replace them with HKS plugs before doing any tuning... In my experience, you really don't wanna skip the plugs. Even on a "mild" Stage 1, the stock gap is usually way too wide—like .034 or so—and you’ll likely get spark blowout under high boost. While the HKS ones were already mentioned, if you're looking for a budget-friendly move, you can actually use Denso 5346 IKH24 Iridium Power Spark Plugs which are a bit cheaper and work great. Just make sure they're gapped down to .022! With a $2k budget, I'd grab the Burger Motorsports JB4 Tuner for Kia Stinger / Genesis G70 (roughly $600) and definitely add the Velossa Tech BIG MOUTH Ram Air Snorkel (around $190). Those snorkels are basically the best bang-for-your-buck for fighting heat soak cuz they force ambient air directly into the intakes. Since you're worried about summer heat, I'd honestly put the rest of your cash into a Mishimoto Performance Intercooler for Genesis G70 3.3T. It's about $850, but it's a total game changer for consistent pulls. Plus, it's way more effective than just doing intercooler pipes alone. Anyway, that setup keeps you right around $1,700 and makes the car feel sooo much more aggressive. gl!

ysvtyfrsuz · Answer

Seconding the recommendation above. The tuner setup mentioned earlier is a beast, but you gotta look at the supporting cast too. Since you mentioned being cautious about reliability, basically, you need to address the GDI engine quirks and drivetrain weak points before you start chasing big horsepower. * **Oil Catch Can**: This is a total must-have. GDI engines get nasty carbon buildup on the intake valves over time. I'd suggest picking up the ADD W1 Dual Baffled Oil Catch Can Kit V3.3 to keep the intake tract clean and running smooth.
* **Differential Brace**: The stock rear diff mount is a bit of a weak point on these cars. If you're gonna be using that extra torque for hard launches, grab a SXTH Element Engineering Genesis G70 Rear Differential Brace to prevent the diff from twisting or snapping.
* **Alternative Plugs**: If you don't want to go with the HKS ones already suggested, look at NGK 97506 Iridium Spark Plugs. Honestly, don't even think about tuning without them. You MUST gap them to exactly 0.022" or the car will misfire under heavy boost... I've seen it happen way too many times. Make sure to do those plugs first. It's basically the cheapest insurance policy you can buy for this engine. gl! 👍

gpyilquelt · Answer

For your situation, I was literally in the same boat just a few months ago. Im still kinda a beginner with this stuff, so I was super paranoid about breaking something on such a nice car, you know? Ngl, the first thing I did was pick up the BMS JB4 Tuner for Kia Stinger / Genesis G70, but I was hesitant about the spark plugs. I thought maybe I could wait, but after reading way too many horror stories, I just bit the bullet and got the HKS M45iL Super Fire Racing Spark Plugs. Honestly, even on a mild setup, you gotta change those plugs or at least regap them... its just not worth the risk of a misfire! I also added the BMS Dual Performance Intake for Kia Stinger / Genesis G70 and the turbo spool sounds are basically addictive. My main lesson was definitely to prioritize those plugs first though. Better safe than sorry, right? gl!