Power, daily reliability, and no regrets. These cold air intakes, cat-back exhausts, and suspension upgrades are for the 10th Gen Si — tested, durable, and ready to bolt on.
5 Cold Air Intakes options
1. K&N Typhoon Intake (63-3514) – $330
CARB legal, direct fit, adds induction sound and low-end torque.
2. PRL Motorsports Cobra Cold Air Intake (Street MAF) – $395
High-efficiency, keeps MAF scaling spot-on.
3. 27WON Cold Air Intake – $420
One of the most respected intakes in the 10th gen game. Big airflow gains, premium fit.
4. DC Sports Cold Air Intake – $290
Solid gains, decent sound — fits 1.5T trims.
5. Mishimoto Performance Intake – $370
Solid build, sharp design, adds whistle to your turbo + response.
Why? (If you’re here you probably already know, air is the name of the game) More air = more boost efficiency. Better throttle feel, turbo spool, and that sweet whoosh.
5 Inexpensive but Durable Cat-Back Exhaust options
1. Yonaka Cat-Back Exhaust – $350
Clean welds, subtle tone, fits 1.5T sedan/coupe.
2. DNA Motoring Cat-Back (1.5T Spec) – $290
A+ Price, aggressive tone, decent build for the money.
3. Remark Axle-Back + Midpipe Combo – $500
Lightweight, loud when you want it, daily-friendly when you don’t.
4. Megan Racing OE-RS Exhaust – $480
Factory-style look, deep tone, stainless piping.
5. ISR Performance Street Exhaust – $450
Well-built, mid-volume exhaust note, fits right out the box.
The Why? Air… More flow = better efficiency. Adds personality without drone or CELs. (Imagine breathing, you want to exhale just as comfortably as you inhale)
5 Coilovers / Lowering Springs options
1. Godspeed MonoSS Coilovers – $480
Full coilover setup with damping adjustment — best bang for buck.
2. Rev9 Hyper-Street II Coilovers – $470
Adjustable ride height + rebound, quality at a grea
4. Eibach Pro-Kit Springs – $275
Clean, balanced drop. Feels like OEM+ but sharper.
5. Skunk2 Lowering Springs – $260
Aggressive stance, improved handling. Designed to match Si dampers.
Why? Why not? Stance, control, and less body roll without wrecking daily ride comfort.
⚠️ Fitment Notes:
• All parts above are for the 2017–2020 Civic Si Sedan/Coupe
• Make sure to select the right body style when ordering (some brands split sedan/coupe)
• Use Street MAF version intakes if you’re not running a custom tune
Conclusion:
This is the blueprint for real-world power and style on your Si. These parts are battle-tested by tuners, daily drivers, and street legends. Feel the difference, and (try) to make it a sleeper or make her scream 😏 — your call.