What would be the most gain for me? 2004 Acura TL, PCD and j-pipe or Cold Air Intake and Catback exhaust?

 

pcd + jpipe combo.

then might as well finish off the exhaust with a catback exhaust

 

^agree

 

First option, by far.

 

so just forget a Cold Air Intake all together? would it be better to do the resonator delete?

 

Neither CAI or resonator delete do anything performance wise.These mods are basically for sound only.

 

A CAI would probably add 5-8 horsepower, but nothing that's going to throw you back in your seat. The PCD and J-Pipe combo will provide the most gains if you plan on staying naturally aspirated and doing these is definitely the right place to start.

Check out our V2 J-Pipe that deletes the third cat. It's made here in the U.S. from high quality stainless steel and is dyno proven.
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Is there anything you can do to the intake for performance gains? or just CAI

 

Ya my plan is to keep it till it dies. Only have 85,000 miles on my '04 TL. Anything else you would recommend? Simple "bolt ons", i'm already thinking of doing a cat-back exhaust soon.

 

I highly recommend our XLR8 crank pulley as well. It will free up an additional 5-10 horsepower and won't break the bank at $198.

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Thanks! Could you give me a link for the PCD's?

 

I don't think he's going to link a competitors product.

I have the XLR8 v2 J-pipe on my J30 Accord and the improvement was noticeable, should be a bit more on the larger J32 in the TL.

I'd check your local emission laws before deciding on either precat deletes or high flow precats (same vendor sells both) because having to swap out the precats before every state inspection would suck if you have to pass a visual or a tailpipe test. And if you go with the PCDs you will have to make additional exhaust mods (like an additional resonator) because it can become somewhat raspy if you don't.

As far as an intake goes, that's a later mod. On a completely stock engine the gains are minimal. They do sound good though.

And if your car is a regular TL, swapping out the rear 17 mm anti-roll bar for the 20 mm TL-S rear bar is a nice mod and pretty cheap-$60 or so at your local Acura dealer.

 

Will pcd and j pipe cause rasp with a unmod stock exhaust ?

 

^ yes. PCD alone will cause the rasp. J-pipe does not cause rasp or very very very little.

 

K, thanks. I was thinking about getting those 2 parts and just remove the mid muffler . But if it will have to much rasp I will just leave it alone .

 

you can just get the j-pipe and a high flow cat. That combo doesn't rasp or smell

 

how is gutting stock precats compare to rv6 pcd? I have an extra set of bad precats

 

^ you could but remember the oem opening are around 1.75in unless they are tl-s. Richie opening is around 2.15-2.25 depending on where you measure.

 

I have a tl-s. The bad cats I have is off a base tl. Will that still work?

 

So Richie's pcd won't bolt onto stock j-pipe because the bottom opening is larger?

 

it will bolt on, but you still have a lip when the PCD transition to the stock J-pipe. So you will still have back pressure and to some extent exhaust reversion.

So yes start with the J-pipe first.