MikeyTX

Any one care to speculate on the gain in hp/torque numbers ?

Achmed

Without the optional exhaust it'll likely be 450 hp, and with probably 456 hp.

MikeyTX

Be interesting to know

VinceJB

WOW, you guys are still stuck at 450hp

Achmed

lol I hope its more, but I don't think it will be. The poster who claimed to be a laid off marketing staff member stated 456 hp. He was right on everything else, so I kinda believe him, ex. he said there would be no more round tail-lights, he said the car will look great and not really resemble any previous Corvette, and that of all the renders the Car and Driver latest one (at the time) was closest, which also turned out to be true.

Larry/car

The Z51 option package and magnetic ride control is going to be expensive. They will need to be purchased to have all the car's handling select ability. I really want the ability to change the cars control feel. Should be really neat! I might have to delete performance exhaust and other trim options to keep MSRP within reason. We will see.

elegant

GM hasn't finished fine tuning the motor. After they do, it goes to Society of Automotive Engineers (SAE) for certification. At that point we will know how much HP and TQ the LT1 has, both with and without the performance exhaust.

In the meantime, we speculate, and while fun, we do not know the actual amounts of either TQ, nor HP, nor do we know how much extra power the perf exhaust will produce

DREAMERAK

With the LT1 superior tuning ability and 2 3/4 inch exhaust tubing, I think 10hp is possible.

MikeyTX

The big question in mho will be : Is the hp/torque gain going to be worth the cost of the system and, will the gain be across the entire power band. Unlike that of the NPP which I have on the '11 and quite frankly think it sucks swamp water.

Boil

I want GM to offer the option of getting the Variable Tuned Performance Exhaust with the tips powdercoated black…

Snorman

The variable tuned exhaust is on my list of desired options, but honestly, if it's only a few hp it very likely isn't going to be worth it. It would be nice if GM gives us some hp ratings (with and without VTPE).
S.

Achmed

Horsepower aside doesn't the exhaust upgrade give a meaner exhaust sound? That would be enough to sell me.

FloydSummerOf68

HP/TQ increase won't be anything meaningful.

Get it for the sound.

Centex

Agreed - I think it does --- i HOPE it does ... i really dont want to buy aftermarket exhaust ..

speedlink

Where did you get that? Tadge said a minimum of 450.
It will be higher. Engine hasn't been certified yet.

speedlink

Racerdave24

Like others, I would not get it if it's only a few horsepower difference. I LOVE the Corsa sound too much and think it would be a waste of my money unless......it happens to sound like the C6's with Corsa.

Boil

But it HAS to be better than stock, it has the word PERFORMANCE in the name…!!!

Achmed

Yup and 450-456 = a minimum of 450

GM officials have said all of "estimated" 450 hp, "at least" 450 hp, and simply "450 hp."

I hope its more, and think it's plausible to be 460-470, but my instinct just tells me it will be 450/456, largely based on what the former GM employee and CF poster stated earlier.

Michael A

If they did a good job designing the base mufflers for low restriction, then there would be no change in horsepower, just as their is not a change for the Camaro SS. It's a variable sound control.

Michael