What is the single best mod for an 04 TL to increase horsepower? I have always felt like this car was short about 30 horses, what is the best way to juice up my ride?

 

Supercharger

hey you didnt specify money range. lol. BUT if you had to say value wise I would have to say personally I believe the underdrive pulley best, AEM CAI second best adn if you got a spare grand e-pro cats.

 

only performance mod i've done is the AEM cold air intake and am very pleased with the extra power and sound...it won't give you 30 horses, but makes a noticeable difference in acceleration...

 

pro cats 1100 for 25 hp = best bang for the buck. It will also improve the ability of the CAI to do its job.

 

What is the Pro Cats 1100, do you have a link for this? Where would I buy this unit, plus do I need to be concerned about smog certification?

 

He means the E-Shift Pro Cats. They are about $1,100. You can get them from Excelerate (a vendor on this forum). There are countless threads on this topic. Use search.

 

I agree, in this order.

 

Great, now how about the smog, and warranty issue? Does anyone know if the E-Shift Pro Cats, or AEM cold Air Intake will keep the car from passing smog certification? How abut the car warranty? Last, any major changes to fuel economy I should be aware of. I know all this is probably listed in some previous thread, but if you know the answers, please share them here. Thanks for all the advise, I'm getting ready mod...

 

well I know the pulley definitely made an excellent mpg increase, average of 2mpg city and highway. I was extremely impressed with the pulley for performance and mpg increase.

 

Pro-cats will improve hp and fuel economy. I think there was a guy on here that already had to smog, or passed smog or something with pro-cats on.

 

This is an change/expansion of your original request (you had no conditions on the "need for speed"). The CAI does not effect inspection standards but I am pretty certain that the Pro Cats do NOT comply with smog in Cali (nor either in most other states). Take your pic, you want performance OR complaince? These are often two diametrically opposite positions.

 

Don't those words mean the same thing? Therefore, you are saying they are the same...

 

hmm.. somebody said that the eshiftpro cats will NOT pass smog.. can someone please confirm???? I really hope it does.. I'm really thinking about getting it if it does pass. I would have to take it out every1-2 years just to smog and then put back on after passing smog. THnx

 

So if I have to take the Pro Cats off for every smog, can someone tell me how much labor is required to install, uninstall this unit? What exactly does it do anyway?

 

The pro cats will not pass a thorough visual inspection, but they will pass the actual wand test. I have never seen a tech perform anything other than a glance type check and then proceed with the wand. I am in cali and I am not worried about it! It took me 3 hours to do the install, and if necessary i could go back to original, but I dont think that will be necessary. They are high flow cats, they allow the exhaust gasses flow much easier from the engine. virtually every other mod is on the intake side of the motor, this is the only way to really maximize the benefits of your intake side mods. They make a dramatic difference.

 

great! I guess my last question is, because this is on the exhaust side, will it make the car much louder?

 

Nope, they shouldn't make the car louder, maybe slightly, because you aren't removing any other components of the car which are made to minimize how loud the exhaust is, resonator, muffler, or mid-muffler.

 

I have what has been refered to as a stage 3 exhaust mod and once I installed the procats the exhaust note did change, its a little bit louder, but not much

 

I have the Pro-Cats with the stock exhaust (Comptech exhaust is pending). I notice a very slight increase in "throatiness," especially on startup in the morning. Very nice. Other than that, no difference.

 

 

Just know that you'll always have this!

 

i this a cai and a ur underdrive pulley will give you some nice gains and you should be able to purchase both for $500.00 or less. I you have an extra grand buy the comptech exhaust with these mods you should notice some nice gains and can probally install them yourself.

 

Extra grand...........buy the procats, then you will notice the gain!

 

pro-cats def. i LOVE mine. ive got AEM CAI, Pro-Cats & CT exhaust.. sounds sweet as hell. aggressive, mean and not TOOO 92 Civic HB w/ no resonater ricey. huge power increase

 

Can someone clarify?

UR underdrive pulley, CAI, the Pro-cats, and if I get the Comptech headers with exhaust, do I still need to do the mid-muffler delete?

 

comptech headers? i think the pro-cats are what substitute those since technically there are no headers on the TL??? the midmuffler delete would only apply to stock exhaust setups so there would be no need

 

Right. The 3G TL engine will not accept headers.

 

Don't forget about the comptech exhaust it does work

 

and it sounds f*$ing awesome. i LOVE my comptech exhaust. combined with CAI/CATs you've got mean 30+ hp 30 tq gain