dapopa9

I see that Greddy is now making an exhaust for the Z06. I used to have these on some of my Import cars and they were great.

They claim a 27.2whp / 34.7ft-lb increase! Seems like a lot.

Anyone do a back-to-back stock vs comparison with the other popular exhaust like a B&B or Akrapovic? I wonder how much increase they show?

Here is the link I saw it at: https://www.shopgreddy.com/collectio...ducts/10188300

Unreal

No way in hell an exhaust does that. Complete horseshit.

danziger

Um, does that include LT headers?

Seriously, I have a hard time believing they got 50% of those published gains.

MTPZ06

Umm...no, those results never happened. Almost identical to K&N's claim that you can gain 27.22 hp from their air intake on a C6Z. Wow...54.42 hp just from greddy exhaust and a K&N intake.

I'll admit that at least it comes with an "X" mid-pipe, and looks like a well constructed system. Not a fan of the two tip system though.



Its even a stretch to believe Akrapovic's claim of 13hp for their evo system; but damn, at least they aren't in the realm of outlandish.

Macattack

Sounds good, jury is out for me on the looks. I agree with the above posts on hp gains, unless it's a full system with LT headers, really hard to believe that's the case for the advertised price for 1k.

Unreal

Even with a tune.

On a 1000+hp car, going from stock to full 3" is ~5-10hp. Stock systems have made 1400+rwhp. There is no way a factory system to anything is adding over 20rwhp. Not going to happen. Just more made up marketing crap.

dkz

check out the weight 47.2 lbs vs oem 71.7 lbs. i assume 71 pounds for the whole stock system from the cat??

LMB-Z

Yep, new exhaust--- +25 hp
new CAI--- +25 hp
new hood seal--- +20 hp
lose the door jamb emblems --- less 1/2 lb=5 hp
nitrogen in the tires is an easy 30 hp + loss of 5 lbs
painted "Corvette" letters is probably good for 5 hp

outhouse

You forgot that 20HP for intake manifold insulation

Nowanker

AND the 7 HP for the throttle body heater bypass!

Always skeptical when any part advertises dyno HP gains down to the tenth. If anyone can get repeatable dyno numbers even down to 1 HP I'll eat my keyboard.

cseaman

subbed for results. don't care about the numbers, do like the look, weight, and value for the dollar.

.gearhead.

Looks odd from the rear. Would look much better with a diffuser designed for dual tips.

Unreal

Agreed. If it was quiet I really like this system. Love the dual tips.

But stock is 3" (even with the neck down at mufflers in the back). You would buy this system for looks/sound/weight. Not power. No aftermarket system has shown more than 5-8rwhp, and even that is typically "let it cool off on dyno" gains.

HOXXOH

I see what happened there. They got their numbers mixed up between the weight, power and size.
The weight difference is 24.5 lbs and they added a 2.7 whp gain to get the 27.2 whp.
Then measured the total length of the pipes and mufflers (12.9 feet) and added the weight (24.5 lbs) to get the 34.7 ft - lb.

It all makes sense now. Just pick an assortment of measurements and add and re-label them as desired.

Unreal

Maybe they mean peak power difference which would make sense (not peak numbers but peak difference). Closed valves on stock system typically is ~30rwhp. So if you did a check at 3000rpm before valves open, a 30rwhp/30rwtq at 3k is completely believeable assuming they are checking there.

Or they wired the valves shut and compared to that.

Nowanker

It's the New Math!

cseaman

ttt - anyone commit?

Shikaitsu

Any chance you can make this fit on a base model? I'm looking for a decent dual tip setup.

Durien512

meh .. silly claims... I dont like the looks either.

MTPZ06

Should fit no problem...just need the the LS7/LS9 (pre 2012) exhaust manifolds and cats. Or you could run B&B LT's if you're ok with being catless.