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23 GRC exhaust & Intake

2.4K views 11 replies 7 participants last post by  cadeus  
#1 ·
I have a 23 GRC core I'm looking at installing the Eventuri Intake, the AWS touring exhaust, the OTL catted downpipe and adding in the JB4 tuner. Based on the reads this should add about 20-30lbs to HP and torque. Any input on the products and hype would be helpful before I pull the trigger.
 
#2 ·
I would pass on the JB4 and go with Ecutek you will probably have to send logs back but easy enough. Eventuri looks amazing but if you can get another intake that maybe a gain of a couple of HP less for half the price I would go that way.
 
#4 ·
Trash the jb4 idea, eventuri intakes are nice to look at but even after all the supposed CEL "fixes", people are still getting CEL's. I would consider a different intake. If you do chose the eventuri, you can delete the CEL with Ecutek.
I dont know why so many people are so sold on the AWE exhaust TBH. Me personally, I would never pay for an exhaust that weighs more than the stock one unless it was dyno proven to give a substantial power increase.
 
#10 · (Edited)
It brings back memories of when I was poor shaking marbles inside a can to beg for money. That's why it sounds so familiar to me.

Jokes aside, maybe the sound is lost in the video, but it sounds hollow. I'd need to hear it in person to make a decision, but even in my Subarus I'd never wanted to run Ti due to the hollow aspect of it.
i still think the best sounding exhaust for the G16E-GTS to date has been the titanium akrapovic for the the GR Yaris. It can definitely been done right, hopefully the RK sounds like this, their BMW exhausts sound phenomenal in person.

I have an OTL downpipe and I will post clips of both the signature and track versions of the RK when I get them.

You can order the track and signature RK exhausts, you just email them and they will invoice you when they ship, but I haven’t gotten an email yet.

The track version weighs 6 lbs, which is pretty awesome.

RK Signature Exhaust is also dyno’d at +9whp/10wtq, for whatever that’s worth, but not sure if I’ve seen that on any other exhaust.

I think adding any weight to the car would personally bother me.

It seems inconsistent to put up with an AWD system that shuts down to protect from overheating on track, a compromise that was probably in large part to keep curb weight down, and then add weight with something like an exhaust.

You can get pretty close to a Morizo curb weight while retaining the back seat.

Morizo - 3186lbs
Core w/PP - 3262 lbs

Some of my mods:

Eventuri intake - 2lbs saved (I know, it’s overpriced)
Apex VS-5RS wheels in 18x8.5" ET23- (16.9lbs vs 23lbs stock) - 28lbs saved - you REALLY feel this
Antigravity Battery - 25lbs saved
RK Signature Exhaust - 22lbs saved

Theoretically 3195lbs, just 9lbs over a Morizo, while retaining a back seat.

I haven’t weighed the OEM downpipe/midpipe, but I feel like there is probably a weight savings, maybe 5lbs, from the removal of the secondary cat.
 
#12 ·
Definitely avoid the JB4 and go straight to ecutek tune. The eventuri intake is pricey so you want to make sure you get a proper tune to extract every ounce of performance out of it.