This is my dream exhaust. It’s everything I’ve wanted from the moment I began lusting after it. I’ve never been one for those hyper-ridiculous exhausts and “fart cannons” as people like to designate them as. I wanted a modest sound improvement and that’s exactly what this exhaust system delivers. The tone of the exhaust is quite similar to stock but with a deeper, richer, more full note. This is definitely one of the most quiet exhausts for the 8th Gen Si, so if that’s not what you want I would choose a different exhaust. However, if you want a truly OEM+ exhaust system that makes your car sound like it should have from factory, this is the one. The build quality is top tier. The welds are beautiful, and the fitment is like Honda made the exhaust system themselves. It’s perfect, super simple to install, and sits perfectly in the exhaust tip outlet. Absolutely beautiful. One con: The exhaust does have a bit of drone at 3,000-3,6000 rpm. Which is perfectly at 70-75mph when you’re on the highway. I don’t mind it but it is present, though I’m sure other exhaust systems would be worse if they’re louder elsewhere. Overall 9/10 and would recommend to anyone looking for an excellently made, beautiful sounding exhaust!

Product was amazing no cracks or bends from shipping had all the hardware fit the car like a glove and sounds amazing , the wait time for it was the only flaw waited about 4 months. (Not hardmotions fault but how things are right now due to supply)

Best exhaust for 8th gen civics. Had a full race before this one and it was way too loud.

I freakin love this exhaust!!! It sounds great, nice deep tone. This exhaust is very quiet for an aftermarket catback, but it's exactly what I wanted. Couldn't be happier. hardmotion was extremely fast shipping it out.

Before I get to far into the review, my current setup on my 09 FA5 consists of a K&N Short Ram Intake, stock headers and now an Invidia Q300. No tune yet, so a very basic setup as of writing. That said, I wanted to go with an exhaust that would be a step up from stock, yet quiet enough not to draw undue attention. After spending a few hours with videos and personal reviews, I opted to go with the Q300 because it met what I was looking for. Personally, I feel that it's not that much louder than stock. It has a meaty feel, and I've felt a difference with the ol' butt dyno when I let vtec open up. There is a noticeable drone in the 3k-4k operating range, but even with a stock radio, you can offset that by turning up the volume slightly. Overall, I love the way the exhaust sounds and looks. If you're looking for something to catch attention, personally I'd say look elsewhere. If you're trying to stay lowkey but move beyond stock, this is where it's at.

I wanted an exhaust that wasn't obnoxious but made my 8th-Gen Si sound better than stock. I did a lot of research about this versus other exhaust systems like the Invidia N1 and the Full Race exhaust and for the value I went with the Q300. Had a professional install it and it sounds amazing! If you want a mature exhaust note for your Si, look no further and get the Q300. If you're looking for a little more performance and price isn't an issue, I'd look into the Full Race. Can't go wrong with either one. Shipping took a while because they were on backorder but it was shipped in perfect condition. Thanks Hardmotion! I will definitely use this site for future mods.

Invidia Q300 is a best catback exhaust for Civic SI. 1. It's beautiful. Muffler looks gorgeous (even with stainless tip). 2. It has optimum size (66mm inner diameter) - which is enough for most modified SIs (to gain hp). 3. It sounds just awesome. Sporty. Moderate loud. 4. Value for money. Also very good.

BEST QUALITY for exhaust ! AND EVEN BETTER WAS FAST SHIPPING!

Recently purchased for my FA5 Civic SI. Absolutely love the exhaust! Fitment was perfect and install was fast and no nonsense. Tone is great, a bit deeper than stock and nice and quiet when cruising through the neighborhoods. Customer service was a 10!! Fast shipping and fast response on questions and concerns. Mike was a huge help. Not to mention prices were the cheapest around...

Ordered mine and got here 2 days later, installed it in about 1 hour at home with basic tools. Just gotta spray the oem bolts down and let it sit. Sound is pure amazing. Get this exhaust you wont regret it! Perfect for guys who want to keep a mature car note.