Hey guys I've been a long time Honda head owning a 98 civic coupe ex 5 speed and a 99 civic hatchback dx with a b16a swap but since buying a house and having a kid I've sold those and picked up a 2016 gk5 LX 6 speed and have been loving the car so far. I've already done the hasport 62a solid rear engine mount and the acuity solid shifter bushings to make the car feel better to drive and it's done exactly that, couldn't be happier with how the car feels to drive.

But now that I've had the car for a year or 2 I've been looking into doing more performance type modifications. I've read probably every thread on this forum about the right upgrades to do that are worth the money and I'm planning to do them in this order:

1. Get rid of the stock hubcapped steelies for some konig helium's to reduce unsprung weight
2. Flash the ecu with ktuner v1.2 (v2 is too expensive for what I need it to do I think)

3. Rv6 catted downpipe, I want to leave the rest of the exhaust stock so I can get a bit more power without having it sound like a stereotypical fartcan Honda

4. Takeda 5r cold air intake system
I've seen posts on this forum about all of these different upgrades, but I'm mostly looking for if anyone has dyno sheets to see what/where the power is increased from these upgrades, and I also can't seem to find any videos of what the gk5 will sound like with ONLY the rv6 catted downpipe installed without the rest of the stock exhaust being replaced (this is mostly so I can convince my wife that the upgrade won't make the car unbearable for her to be in the passenger seat for lol). My goal is to make the car as fast as my b16 swapped civic hatch was, but I doubt with only these upgrades that will happen, but it doesn't hurt to try!

Also, while I have your attention here I'm also curious if it's possible/practical to get these ecu's e-tuned like the k series engines can be in the 8th, 9th and 10th gen civic si's? Since this platform isn't as widely modified as the k series engined platforms I'm not sure if I'm better off just bringing it somewhere to be dyno'd by someone extremely familiar with the L15b and/or ktuner's software to get the most out of the tune was possible.

Thanks for your time/answers in advance!

 

Mods so far:
-Sumole air cooler
-Drop in k&n air filter
-RV6 catted header/collector
-2¼" "B" pipe (will do "mandrel bend" if it works)
-Tanabe Medallion axle back
-CRZ BuddyClub short Shifter
-Acuity shifter cable bushings
-Acuity accel. pedal reloc. bracket
-KTuner V2

Intake mods...

-Covered up all sound deadening holes on oem airbox to force all air through intake to the throttle body
-k&n drop in filter

Fun part...

Got ahold a used but nice condition CR-V throttle body and since it WON'T fit the oem intake manifold a friend of mine and I fabricated an aluminum spacer to adapt it...

-I also disassembled the oem elbow from the airbox and used a 63mm x 70mm 90 degree elbow since that is the "bottleneck" of the tiny intake....

SIDE NOTE:
i haven't been able to dyno it, but... the "butt dyno" feels pretty good after the mods

This said.... if you don't want it to be SUPER loud.... do the downpipe and axleback... but leave the midpipe oem.... since the resonator is in that part of the exhaust...

 

I've done a fair bit of work on my truck's engine, and I'm finally going to get a dyno tune to maximize my investment. Others who have gotten the tune for this truck with similar mods have seen a 20-25 hp increase from the tune. I hope to see the same.






Tutuapp 9Apps Showbox

 

I have the RV6 cat'd downpipe on my 2018 CVT and had it on with the stock muffler at first. It made no added power and no sound difference. When I installed an HKS muffler on the back on top of that it opened the top end by a bunch. It is not worth buying a $600 downpipe just to go into a stock muffler that doesn't flow or sound good.There will be no gain there, even sound.

PS: the car is also running an AEM intake and throttle controller with no aftermarket tune. Between the intake, controller, downpipe and muffler it is quite a but faster top end. Along with better throttle response. As far as dyno numbers go nobody really knows or even cares. I just added the performance parts for a better driving experience more than making max HP. I like to hear my cars when I drive them. But I wouldn't waste time putting my car on a dyno.