Dual exhaust sound great when you have stock cats. It's once you open it up they do not sound good. I have heard the borla with and without cats. Sounded like crap, then he put a magnaflow xpipe muffler in and it sounded like the stock vq sound but better. Same with the injen, and the hks. I have stock cats on my z with my agency power and it does not drone at all, i have taken it to san antonio with no headaches or other problems as i did when i had my high flow cats and test pipes. The sound of the hks for being such a high dollar exhaust to me is just now what i expected from an hks. I expected a clean exoctic sound and that just was not what I heard. I had this horrible whistle noise coming from it. It was on my car 1 day and it was gone.

 

Nope I bought one of the old style agency power a couple of years ago someone had painted over with high temp black paint. ran it for 2 months then hit it with air craft stripper to clean the paint off. The rainbow color came off also and the ti can looked just like a jic can just bigger.

 

oo you have any pics, i would like to see how it looks

 

no sorry that was years ago. its been long gone. don't even remember who i sold it to. that was back when i purchased the dominator which was to damn loud and droned way to much.

 

oo i see, so what are your running on your z now?

 

The regular APwith the ti painted can. the color really doesn't bother me. I get lots of complements on how my car sounds. With stock cats it doesn't drone at all, and even with high flow cats for traveling I put a silencer in and it did just fine.

 

oo i see, i wasnt a ever a fan of that "burnt" look i wanna say if you wanna call it like that, but its starting to grow on me. thats the only thing i didnt like when i started researching exhaust and about the HKS

 

unforunatly the only way you are gonna be able to tell what you like is to either order one or find some locals to you who might have some of the exhaust on their cars. but each person has their own opinion so take a listen around see what ya like. its your money, your decision, and your own taste.

 

ya i see what your saying

 

I like the look, I like the sound. But is HEAVY!!!!! HEAVIER THAN STOCK!

 

what do you do that the 5 extra lbs that sit at the lowest point of gravity on the car will make a difference??

 

I didn't weigh it but I would guess it's atleast 10 extra pounds. May not matter so much in handling, but in acceleration, of course!

 

I have it... I wouldnt say its that big of a difference, and either way the weight is better distributed then the stock one regardless.

Like I said what do you do where you notice a ten lb weight difference?

in acceleration the differnce on a stock one is:
The quarter mile acceleration time of car A which weighs 3300 pounds and has 285 horsepower is 13.178 seconds.

The quarter mile acceleration time of car B which weighs 3310 pounds and has 285 horsepower is 13.191 seconds. Car A is faster than car B by 0.0129999999999999 seconds

That is strictly by the math nothing else considering. I doubt many if any of us notice that .0129 seconds that was lost.

 

+1 it makes absolutely no difference whatsoever. most people have a huge misconception of weight as it applies to cars. our cars weigh over 3000 pounds so unless you're doing carbon fiber or titanium EVERYTHING you're gains will be negligible at best. especially in this particular case where you're talking about a weight difference of less then 10 pounds. Even if the HKS was 20 pounds heavier, which it isn't but for arguments sake we'll round up. 20 pounds when you're working with a 3100 or so pound car equates to 0.65% weight increase. I would love to know where a weight increase of less then a 1% is going to make or break your car. Especially when the location of the weight increase, like Barnabas posted, is at the lowest point of gravity on the car. Not to mention people are adding stereo equipment, bigger wheels, additional suspension components etc etc. The argument that the HKS is a bad idea because it's heavier really holds no weight.

 

Adding a turbo kit is what like 75lbs heavier?? BBK's are heavier, Coilovers are heavier, Camber arms and toe bolts are heavier, sway bars are heavier. It comes down to what your goals are and if the gains are worth the weight to YOU.

If I redo my math of the weight/acceleration but add 15 HP which is the claim that HKS makes lets see how it plays out.

The quarter mile acceleration time of car A which weighs 3300 pounds and has 285 horsepower is 13.178 seconds.

The quarter mile acceleration time of car B which weighs 3310 pounds and has 300 horsepower is 12.967 seconds.

Now the heavier car is faster. (at even a 5hp increase the heavier car is still faster. )

 

Exactly my point thank you! Obviously, an exhaust upgrade will play some part in increasing performance but for most it's a cosmetic upgrade at best. Everybody will have their opinion of what sounds/looks the best and that's what matters when you're making a purchase decision. Not how much weight you will gain/lose over stock.

 

They ALLLLL add up! In my opinion, expensive aftermarket REPLACEMENTS parts should be higher quality AND lighter.

And by the way, my Stoptech BBK is actually lighter as a package. The rotors are lighter because the hats are aluminum. And the calipers are aluminum vs OEM iron!

 

they can be, what size are your stoptechs?



And no sway bar that is stronger then stock is lighter. However the handling gains you get from them far outweigh the lost benefits of adding weight.

I have yet to weight my car but all the weight I have added has been more then made up for in power added and in weight savings in other areas.

My biggest reason for asking you what you did and since you didnt answer I assume you dont do any type of racing at all. Why worry about a 5lb difference if you dont use it to any benefit??

 

Stoptechs are 6 piston front, and 2 piston rear, again I chose 2 in the rear for weight savings.

Well the sway bar is a given, you have NO choice! It's the nature of the beast. But things like exhaust, you CAN have a lighter system.

 

what size rotor? and you keep skipping the question... what do you use these upgrades for where you are worried about a lb here or there??