civic si

Hello all, Im looking for gas pumps that have 93 octane but the closest pumps with 93 are Cheyenne or Denver both of which are about an hour drive. Which I dont want to drive an hour for gas. Ive heard of things called "octane boosters" but do those even work? are they worth the money? Im...

I change my clutch yesterday on my 2018 civic si with 103k miles. I went with the Rv6 retro fit light weight fly wheel & the exedy stage 1 clutch kit. We got everything thrown back together and started the vehicle while it was on jack stands & it went into gear, tires spun. When we lowered the...

Like many 10th Gen SI owners, I have always thought that the piano black trim piece in front of the shifter seemed bare. Of course, some owners have purchased the Type-R trim piece replacement and had a custom plate made to emulate the Type R. Since my SI is not a Type-R, I did not want to do...

Like many 10th Gen SI owners, I have always thought that the piano black trim piece in front of the shifter seemed bare. Of course, some owners have purchased the Type-R trim piece replacement and had a custom plate made to emulate the Type R. Since my SI is not a Type-R, I did not want to do...

I am thoroughly impressed, I purchased my 2020 Civic Si 2-Door Coupe in 2021 with 9,000 miles on it. It is FINALLY time to put some new brake pads on it, Im about to hit 40,000 miles and the pads have basically nothing left on them. So, when I owned my GTI there were plenty of options to choose...

So I only have one year left on my 2020 Civic Si Warranty. It has been good to me besides an AC Compressor going out which was obviously covered under the recall. Im about to hit 40,000 miles on the ODO. So I think its time to say "to hell with the warranty" and get some more power and sound...

Like the title says I'm selling my 27won W2 turbo charger and turbo inlet pipe for 10th gen 1.5t civic. Never installed on the car, my car was totaled before I got the chance, looking to get 1,200

Is anyone selling a pair of 2020 2021 civic si headlights ? I’m located in the Bay Area, I’ll come pick up.

Hey everyone, I have a 2018 civic SI with 110,000 miles. So here's a little background, a day ago it rained really heavy here and long story short the CAI sucked water. Bad yes ik. BUT car was coasting and going maybe 5mph max when it happened. Anyway flushed the water out no problem, had abit...

2008 Honda Civic Si MUGEN 1 of 1,000 Clean Title Low miles - 85,760 Original Window Sticker Entirely Stock Clean Carfax History Detailed Service Records I am the 3rd owner 6-Speed Manual Transmission Two Key Fobs New Michelin Tires New Clutch (Replaced at Honda Dealership) K&N Engine and Cabin...

Selling a Ktuner V1.2 unit. Included photo of screenshot displaying that unit is not locked to VIN. Serial number of Ktuner unit is shown in photo, as well as the corresponding serial number in the screenshot. Selling for $325, which includes USPS priority mail shipping.

Pending sale. Selling my K-Tuner V1.2. I've got the TSP Stage 1 (Stock and PRL RACE MAF) and TSP Stage 1+ (Stock MAF) tunes for Si (2017-2018) included (tunes locked to the serial no. of this K-Tuner). I've got the original box, the original USB cable, and will include the OBD splitter I used...

Hey guys am looking to swap TSP's shortblock into my SI and wanted some feedback from those who have already done an engine swap. I already have plans to replace my head gasket, reuse my arp head studs, add the boundary oil pump gears, and upgrade the valve springs with either the Brian...

Noticed this rattle sound ONLY when revving, I know these cars have loud injectors due to the direct injection, and I thought I might’ve been the injectors since revving requires higher pressure but this rattle sound masks out the injector sounds . I was fearing a knock but it’s been doing it...

Hello just recently I noticed my 2019 si has been making a rattle noise at exactly 3000rpm coming from the dashboard, and it goes away after rpm’s drop, if I stay above 3000rpms for a cool minute I get a slight burning sent from the ac vents , side not I have the ac on cold and have the...

I have a 2016 Touring Sedan and I was wondering if I could swap the front stock bumper with one from a 2017 Si. I’m not sure if it’ll fit or if the Si bumper might interfere with any front sensors the Touring may have.

So ive been told that on the 19-21 FC2 is compatible with civic si exhaust. Ive been looking at that and at least from the path the piping takes, and from that viewpoint it looks like its possible. However im still unsure, has anybody confirmed that this is possible? Id like to verify that the...

What's up everyone! I'm Jesse, and this is my 2019 Civic Si sedan named Luna. Shes a time attack style build in the making. Progress pictures down below. Its been a long road so far but we have so much left to do. I am picking up a Type R seat tomorrow to install so that way I have better...

So I just bought TSP stage 1 tune for my 2020 Si (Canadian spec - if that should help) and flashed it. After I flashed it, I went for a drive and started data logging. I started to notice on my gauge that the car was boosting way too much without going WOT. I noticed 27.9 psi (target is 23.3...

Hey all, I’m looking to buy a used RV6 Catted Downpipe and Front Pipe for my 2018 Civic Si Coupe. Please respond to this thread with information if you’re looking to sell, and I’ll dm you for images and purchase.