►►►Custom 2" Catback - What next? Please help

[KenTK808]

I think you should ditch the aem filter and get a Apex'i world filter and convert to a short ram.
DC header is good
You should have gone with a larger diameter pipe for the exhaust. You should have felt a noticeable gain from removing the cats. The stock exhaust is really restrictive.

Suspension and brake upgrades are always a good choice.

[man83]

Originally Posted by echo-francis

did you feel any difference with the custom exhaust?

and did you think about a lightweight crankpulley or 1zz throttlebody?

Yes, I noticed a big difference, now cutting rpm comes faster. Another change was the sound , now is very noisy, but I will install a Vibrant Ultra Quiet resonator.

All comments talk about pulleys, I think that will be the next step.

Originally Posted by SirDigby

i'd recommend installing a catalytic converter. first, so your car doesn't smell like old wet turd. second, because it's a FEDERAL offence to not have one on public streets. if some drunk slams in to you and rolls your car, the officer might notice the missing smog devices. just because you may live somewhere emissions tests are not conducted, it's still federal law to have one. a $10,000 fine and jail time may result. third, a high flow catalyst will only effect performance about 1/2 horsepower, but will create that much needed 1 psi back pressure.
this is just a friendly warning. do what you want with your car. it's yours.
i'd recommend: porting intake manifold and installing 1zz throttle body; rear sway bar; lightweight wheels; lightweight clutch/flywheel; suspention

Thanks, I already started to look for a high performance cat.
The 1ZZ TB is one of the most popular upgrades that generates good results. Just yesterday I bought the TRD Sway Bar and the Tanabe Tower Strut Bar.

Originally Posted by rabbito

i had similar mods in the begining just like yours...
mine was smoother powerband after 2000rpm from exhaust system...and a slight push after 4500rpm...guess from intake? i was expecting much more..
your opinion? everybody has different butt-o-meter..😅😅😅

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Hahaha! My butt-o-meter tells that the slight push is above 3.5K rpm, perhaps not having the cats on.

Originally Posted by thebarber

dude, we all breathe the air. put the catalytic converter back on.

lightweight or underdrive crank pulley next

Definitely going to install a High Performance Cat.
I think that the crank pulley NST calls me.

Originally Posted by invader166

I'm with thebarber on both points.
Get yourself a lightweight pulley next. (Or an entire set if you wanna go all out) It will really frees up some torque, but will make the car a bit jerky, as the engine will be more responsive.
And yes, definitly put a high-performance catalytic converter on, so it doesn't reduce performance, but still conforms to regulations.

Without questions I'll buy the NST Crank Pulley.

Originally Posted by rabbito

just like invader166 stated...i went with lightweight pulley right after all your mods....you will gain slight tq and faster rpm reach 😎

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Excellente! That's what I need.

Originally Posted by KenTK808

I think you should ditch the aem filter and get a Apex'i world filter and convert to a short ram.
DC header is good
You should have gone with a larger diameter pipe for the exhaust. You should have felt a noticeable gain from removing the cats. The stock exhaust is really restrictive.

Suspension and brake upgrades are always a good choice.

I had the same thought after having installed the 2" pipe, I would have liked a 2.25".