If you are not going nuts for power, Exedy Stage 1 works great. Held Phearable 1.5R tune with no issues (otherwise stock engine). Engagement point can be easily felt and is smooth. No lockouts either.
Final Update
No issues with injectors any more.
Clutch replaced - see below.
Vehicle: 2018 Civic Si Sedan
Total tuned time: 30 Months
Total tuned mileage: 125 k KMS, 148 k KMS total on car
Tuning device(s) used: KTuner V2
Tunes used: KTuner Dual-Factory/23psi, TSP Stage 1, Phearable, no...
My trims dropped as well after installing PRL SRI. Was running zeros with stock setup (K&N drop in) on PetroCan Ultra 94. If I used Shell 91 it would run -5's. After SRI install I'm running -5's on 94 and a bit worse on 91 (as a test). I also note that when idling and heat soak sets in, it pulls...
How many miles on car?
Experiment - ebrake on and in neutral. Press throttle and hold at 1500-1800rpm. See if the counts climb fast and steady (1 or 2 per second). Mine was cyl 3. Injectors were completely fouled... no warranty for me...:(
When is the last time you changed your MTF? Honda fluid lasts around 25k. Should be changed yearly. You could also try Amsoil Syncromesh, it lasts a lot longer than the Honda fluid.
Update-major issues- completely carbon fouled injectors at 80k kms causing a very slight misfire, No codes, monitored misfire on KTuner, cylinder 3. Injectors replaced ($1200.00CAD), I’m working with Honda Canada to see if they can pay for parts only. Honda no pay...
No issues with injectors...
From what I’ve read and past experience….zero differences. If you are tuned you “may” hear a blowoff whoosh once in a blue moon. Some small gains over stock but the same IATs as stock.