Recently, I installed the HKS Hipermax S coilover kit on my 2018 10th-generation Si. I initially set it to the factory default height. My setup consists of a Konig Hypergram 18×8.5 with +35 offset wheels and Continental ControlContact Sport tires 235/40R18.

I lowered the suspension by approximately 0.9 inches from its stock height. Any advice on the fitment of this modification? I’m interested in going even lower, I’m hesitant to change my tire setup at this time, as they are brand new. I just want to close the gap and get a good track stance.

P.s. - the kit feels and rides amazing.

2024 Civic Si with 245 40 18 michelin psas

Planning an oregon trip from LA on 10/22 and this is my current setup. Should i just grab some snow socks and call it or get some winter tires? Forecast looks sunny for next week but not sure about this weather as it can change but need some advice thank you

Hey all, has anyone here come across a similar issue to this ? For the past few days ive notice that on and off my rpms feel (sluggish) slowly climes from first to third gear I can tell the difference because its not constantly happening throughout thr day . I've checked for air leaks, intake hoes looks good, sensors and throtle body is clean car is currently at 85k no signs of misfire or fuel pump issues, i don't know if im creating an issue or is this normal for si's gear ratio ? The biggest difference I've seen is i can almost cruise kn 1st and 2nd gear without the car jerking or asking for gear

I have a 2017 si. Every now n then if I hit 4 or 5k rpm my car jerks and it brings up an emission system error. Then it runs laggy after. But it has just gone away. Other times I’ve had to take to shop because it wouldn’t go over 10 mph. Like maybe a catalytic converter issue. They always tell me it’s a fuel injector issue, and I get replaced. But it’s not seeming to be the issue. Has anyone else dealt with this or would anyone have ideas on the issue? I don’t know much about cars lol.

While parked, engine on, and parking brake engaged, I can't change any of the vehicle settings. Error msg says "To change the settings, apply the parking brake and turn on the vehicle power." Anyone else encounter this?

Whenever i leave the car in accessory mode the battery drains concerningly quick, when I installed my side markers i left it in accessory mode to use the blinkers and see if they were working little did i know it would kill my battery and require me to get a jump. When i went to get the battery tested, battery life was 100% as well as the alternator. Does anyone know what this could be why the battery keeps dying when the car is in accessory mode, advice is appreciated i’m flashing a tune on the car today and don’t want it to die while flashing.