Im gonna be getting a new exhaust soon...and im inbetween the borla or HKS exhausts. I'm looking for performance, and a good low tone, no ricy injen. I also want to get new pipes to clear out some of the tc's cats...like um..2 of the 3..unless you guys recomend i kill all3 but i dono bout that....What do you recomend..and what pipes do i need to get in order to clear out some cats

 

 

neither exhuasts i would recomend. get a greddy evo or sp2 or a vibrant for low tone and little fart can appeal. and as far as piping... 2.25 if you stay NA. if you plan on boosting, save your money for boost and upgrade the exhuast for later.

switching the axle back will help for now. but if you plan on replacing the full piping, then you can either do a full 2.25 mandrel bent str8 pipe for maximum gain and weld a bung for the second o2 or use a high flow cat with o2 bung and 2.25 str8 mandrel bent to the exhuast.

 

I have 2.5" and I'm N/A, so what's the problem. It doesn't sound like Can of Bees, so it is alright. No buzz for me.

 

im not saying 2.5 is going to make u sound like a fart can, the HKS or borla will. the piping will make the biggest diff in hp/tq. 2.5 will loose you some good tq in the begining and you will have less back pressure to make you keep it you will still see an increase in HP but the TQ and get up and go will suffer. with a 2.25 you will still retain some TQ and back pressure to create it and still net the same hp gains.

top end is were 2.5 would be almost decent to have but our cars our not top end cars as we loose power past 5800-6k rpms. it would be wiser to keep as much TQ and HP as possible to benefit you throughout the rpm range on a 2.25 vs. 2.5

honestly also if you not even making past 180hp. 2.5 is useless unless your going mild FI later on.

trust me with 2.25 you will be much more happier.

 

Okay, My numbers on the dyno are very linear, and I do make ENOUGH tq, since I am VERY close to factory specs but to the wheel, and this was with the help of a Borla Universal Muffler and 2.5" piping. I even gave 162.6 of tq, and that is also with no cats, but I do have a good sized resonator. It all depends in the right choice of parts.

 

So how much louder is the Greddy Evo2 compared to SP2?

 

hey just to let you all know having no cats doest really make you car run better, because you CEL comes on and then you run in fail safe mode. it actually makes you run rougher. i would keep one primary cat. One sensor in from and one in rear. even if its a hi flow. that is in the header now so you would need to extend o2 sensor wires. + with a CEL you canot pass emissions. the only way that no cats will help is if you can tune the computer and show a difference between o2 sensors. or else your wasteing your time. the only way i know this is because i am a toyota/ scion certified master tech. And i am part owner of a race shop. without any feed back from sensors you ecu guesses and just makes you run like crap in an open loop system

 

Sorry for the bad grammar in the last one. If they come out with a fully programable ECU, not a piggy back, that would be awsome. Because we could tune, and design around that. we need a system like hondata. We just need another genius to come out with that

 

I don't have both of my cats, I don't have a CEL, my car is not running in Fail Safe mode, so...... u'r point?

 

He said you lose power in the low end, meaning lower rpm, like when you're taking off from a dead stop. You do gain power at the top end, when you get closer to the rev limiter, around when you shift to go to the next gear. A bigger exhaust will hurt your low end power and will make it feel sluggish until you get to higher rpms. If you like the feel of how Hondas feel, where it's unbearably sluggish at lower rpms, and you actually feel (not much more) kick when the engine screams, go with a bigger exhaust.

Anyways, a better option could be the Magnaflow cat-back exhaust and header with an s-pipe and hi-flow cat. There are only 2 cats on the tC. One is in the stock header, the other is right after the s-pipe. The other piece you might be thinking of is the resonator, not a cat, and the Magnaflow gets rid of the resonator. You could also try a shop and see how much it would to make a custom exhaust. There's a shop near me that can make a full cat-back with mandrel bends starting at $400.

 

Kay