Search results

I see, that explains it. The Si needs at least 6 kg/mm in the rears.

I have the same springs and completely agree and staying firmly with stock offset. Nice to see that are used by HPD. Any info on what shocks are they using?

What are the spring rates for these sets?

Strange, I have the Swift Spec R springs on my 2023 Si and they are head and shoulders above the ones I've tried before them handling wise and the way they manage to work with the stock shocks. Probably the more compliant 2025 shocks have trouble controlling them.

The ride is very good for a lowering spring. Also the handling is the best of the ones I've tried in normal or spirited driving. Less body roll, less dive under braking and so on. Lower COG is definitely helping in these conditions. Unfortunately lowering the COG changes suspension geometry and...

I have the Swift set and they are very good for a lowering spring handling wise. I don't have any experience with Eibach springs. Keep in mind that lowering springs aren't really matched with the stock shocks and they can be unpredictable when close to the limits because they completely wreck...

For me, when it comes to FWD fun to drive in an inexpensive package, the Mazda3 is hard to beat. At least before the latest generation. Before my 2018 Civic Hatch LX, I also drove an entry level Mazda3 hatch. Even after installing Si springs on the Civic it still wasn't as fun as the Mazda3...

Welcome and Congrats! This is a great platform, although the Mazda3 is an amazing handling commuter car.

Is there any way to find out if they are valved to support stiffer springs?

Completely agree. I have the Q300 on my 8th.gen and sometimes is just too much. Not to mention that intake and exhaust don't do squat for FI cars.

Just a heads-up. Had this done on my 10th. gen. but I went back to stock following my tuner's advice. Te remnants of rev hang are causing greater delay in this platform anyway...

Could be. To me they feel very close to the HFP springs in my 8th gen that are around 300LBS/in. Except the HFP kit is tuned together with the shocks and is just very firm and not bobbing about.

I don't really have the bounciness on rough roads that @absolude mentions, I think the rebound damping on the OEM struts is more than capable to handle the increased spring rate for a while. The front end much firmer with the stiffer springs, but I would never characterize it as bouncy. If...

I used Pennzoil Synthetic 5W-30 in my 2018 Turbo Hatch with no problems. Definitely engine was quieter. I choose the Pennzoil because the viscosity is at the lower range of the 30 oil weight for viscosity and the great oil analysis.

Definitely! I have the 10th gen Type R sway bar along with the Accord end links on my 11th gen Si.

Got mine used on Marketplace. I'd love to try the ones I mentioned before. These are a bit bouncy on real rough roads.

According to these pictures I took today it seems to have settled in the meantime...

Forgot about this one I took not too long after install. Maybe I should take another one in the same spot...

Thanks for the pic. Is the road slightly downhill? Petty sure mine is higher in the front compared to rear. I'll take a picture if I drive it to work tomorrow.

Sure, NP! Maybe I should say that the front is slightly higher than the rear. Is this the case for stock springs??? In that case, I'd try the AFE Type R springs. Those are progressive and start from 165 lb/in., which IIRC, is the same as stock Si's rate. Thinking it'd be less bouncy on rough roads.