Here are the mods I'm putting in the next couple months. As you will notice, I don't have current plans to enhance to cat or exhaust. I'm looking for feedback on how much this will restrict my gains. Thanks. I also have a thread with extensive feedback on my mod plans https://honda-tech.com/zerothread?id=1312777HERE. Thanks for the feedback.

Crower 404's (Stage 3) - Acquired
Crane Springs and Retainers - Acquired
JG 62mm bored Throttle Body - Acquired
Skunk 2 Intake Manifold - Pending
Apexi VAFC - Acquired
FPR - Pending
Fuel Gauge - Acquired
DC Sports 4-2-1 Header - Acquired
AEM Adjustable Cam Gears - Acquired
Clutchmasters 7.5# Flywheel
Dyno - HOOKUPS IMPORT TEK (Upland, CA) - Appointment Pending
CAI/Suspension - Installed
NO CAT OR EXHAUST

 

It's impossible to say how much it will affect the running of the car. But it will affect it. But nothing wrong with stock exhaust. It's called a sleeper man. Leave it like that.

 

i would at least upgrade the cat to a high-flow one.......the stock integra converter has about a 1.75" inlet/outlet which is very restrictive........the rest of the exhaust it fine for the quietness......

 

why not just get a stock exhaust custom made to a 2.25 inch full piping? i did that, and got a stock look alike muffler, and no one can tell the difference! that stock exhaust is going to rape your setup... r a p e it...

 

My current plan is to custom the pipe from the cat back and add an aftermarket look-alike muffler, which I've seen on the road plenty, the only difference is the fat tip, but it bolts on to existing system.

I've been told that the stock cat to hi-flow cat is a difference of about 2hp, some say 2whp, and some say that goes up as you increase your output, which would make some sense. But lets look at the ratio.

130 stock horsepower, 2hp difference with hi-flow cat. If my mods get me to 160hp, that's an increase of 23%. The equivalent potential increase from a high flow cat would then be 2hp X 1.23, or 2.5hp. So right now I'm losing 2hp and with my mods I'll be losing 2.5hp. I can live with that, for now at least.

Thanks for the feedback, keep it coming. As you can see, I get everything from "It won't make that much difference" to "its going to R A P E you". Facts are nice too, but my research is my chore.

 

I say stock catback w/ a Test pipe.(megan)