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My uncle has a 2006 Corvette and he sent me the following email. He is looking to do the Stage three mod which appears to be a CAI and stainless steel muffler system and headers. What do you think of the cost of $5000 for this modification and the claim that it should add 70 HP? Are there any good Corvette sites? Thanks in advance for your replies, Mike Here is his email to me:

Mike....Yesterday I took the Vette to Ramp Chevrolet for an oil change and

roof recall...Ramp has a separate Corvette division which also does major GM

approved performance modifications. They have a series of stages they do

that modify the Vette for increased performance and of course increased

cost. I am looking at Stage 3 which includes a new high flow increased cool

air intake and a whole new stainless steel exhaust system. The exhaust

includes stainless headers, high flow converters, and performance exhaust

tips. They have a display car there with the system installed and the sound

is incedible. They claim Stage 3 adds about 70 hp at the engine...Cost is

$5000. That seems alot.?? They do several modifications a month. When I was

there they showed me a car they were doing that also adding a supercharger.

(additoinal $9000)

I was thinking of doing Stage 3 because of the sound and ever since I

was young always dreamed of a car with headers. All work keeps warranty

intact and is DEC approved. Do you have any thoughts ???

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That seems expensive for cai/exhaust, by $3K.

Check corvetteforum.com , ls1tech.com (yes I know it has an LS2, but they had the name and didn't plan ahead).

People do get good results from the Corvette with CAI and exhaust, and head work, and superchargers, and cams. Lots of options.

Keep in mind, it is illegal to replace the catalytic converter unless it is broken in most states.

Something like a Corsa cat-back runs $1200 or so plus installation, so say $1400. I actually put my catback system on myself in the driveway.

For the vette Corsa has a choice of sport or touring, depending on how loud you want. Adds 10 hp.

http://www.corsaperf.com/c6.htm shows MSRP $1600, but I see other prices around.

A CAI should be $250-350 or so plus installation, but usually easy to put on yourself. http://www.motorsporttech.com/c6_air_intake01.asp

A supercharger or turbo can be $5K-9K plus installation.

Bruce

2016 Cadillac ATS-V gray/black

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Thanks Bruce, I was thinking that $5000 sounded expensive also, but it is being installed by RAMP Chevrolet. You and I know that we could install it a lot cheaper, but with RAMP doing it, we know that the warranty will remain intact. Can the warranty be voided if he personally installed a CAI?

I do recall you doing the exhaust system yourself. Headers would be a much more difficult job for a DIYer in a driveway on the 06 Vette. That is one reason I didn't suggest we buy a high performance exhaust and do it ourselves not to mention the warranty issues.

I will check out the corvette link you gave me, thanks, Mike

Pre-1995 - DTC codes OBD1  >>

1996 and newer - DTC codes OBD2 >> https://www.obd-codes.com/trouble_codes/gm/obd_codes.htm

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Oh, that includes headers and installation, so that would definitely be more. Not sure how much more, but Headers alone are another $800 (SLP) -$1800 (LG Pro) plus installation. So yes, that makes the $5K more ball parkish.

Does Ramp have before/after dyno charts for their various stages?

LG shows 37 wheel hp from their headers here: http://lgmotorsports.com/gallery/displayim...bum=3&pos=2

Bruce

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I think that before and after dyno runs would make sense and I think its important that the air/fuel ratio be changed to take advantage of the increase flow capacity. I don't know what impact changing the air/fuel ratio would have on emissions or fuel consumption. I posted this question at the C6 forum to see what they think:

http://forums.corvetteforum.com/showthread...#post1555836966

Pre-1995 - DTC codes OBD1  >>

1996 and newer - DTC codes OBD2 >> https://www.obd-codes.com/trouble_codes/gm/obd_codes.htm

How to check for codes Caddyinfo How To Technical Archive >> http://www.caddyinfo.com/wordpress/cadillac-how-to-faq/

Cadillac History & Specifications Year by Year  http://www.motorera.com/cadillac/index.htm

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I think that before and after dyno runs would make sense and I think its important that the air/fuel ratio be changed to take advantage of the increase flow capacity. I don't know what impact changing the air/fuel ratio would have on emissions or fuel consumption. I posted this question at the C6 forum to see what they think:

http://forums.corvetteforum.com/showthread...#post1555836966

Mike,

If I were going to drop five big ones on an exhaust system, I think that I would like for them to guarrantee the 70 HP increase.

That $5000 figure for 70 HP comes out to about $71.43/HP. Have an independent shop do the before & after dyno. Then get the installing shop to agree to drop the $71 for each HP not delivered. ;)

At that price, it would only be fair.

Now, if it makes more than a 70 HP increase, then he owes each of the techs a case of their favorite brew! :D That would be a good idea anyway! B)

Britt

Britt
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Hi Britt, long time no see! Good Point, all the guys on the Corvette site also think that $5K is a lot. My friend is looking into the Vette Doctor here on LI to see if they have a more reasonable deal.

Pre-1995 - DTC codes OBD1  >>

1996 and newer - DTC codes OBD2 >> https://www.obd-codes.com/trouble_codes/gm/obd_codes.htm

How to check for codes Caddyinfo How To Technical Archive >> http://www.caddyinfo.com/wordpress/cadillac-how-to-faq/

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BBF,

My brother has a '99 C5 convert 6-speed. He has a GLH exhaust system, 4.10 gears, and a Magusson-Lingenfelter supercharger, running at about 4-5 psi as I recall. My comments on the mods:

GLH exhaust: expensive, much louder exhaust note, sounds pretty good. The mufflers are of a straight-through design, and I didn't think I'd like it as much as I do. I think it cost about 1000 bucks. Full stainless though. Adds a real good bite to the exhaust note.

4.10 gears: the absolute best mod he did, for the money. Especially with the 6-speed, the engine still just idles along on the Interstate, but man did it add some punch to the low end. I can get wheel going into 3rd with those gears. I don't remember the outfit he purchased them through. It was a complete center section, bolt-in affair. Bulletproof. I believe it was about $1500 for the parts, plus installation.

Maggie-Lingenfelter supercharger: this one is also really cool. It cost about $7k including the required high rise hood. I couldn't imagine his Corvette being any faster than it was with the exhaust/gears, but I was wrong. That car just flat hauls buggy. Chassis dyno showed about 420 hp at the wheels, or up close to 500 hp at the crank. The supercharger is neat, he's even got a little boost gauge on the A-pillar. He got the supercharger installed at ECS in New Jersey. They did okay work. I wouldn't go back to them.

For the bang-for-the-buck, nothing beats those 4.10 gears. That REALLY opened the car up. I don't know what the gearing options are for the C6, or if your uncle's car has an automatic or manual.

Jason(2001 STS, White Diamond)

"When you turn your car on...does it return the favor?"

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Thanks Jason

Pre-1995 - DTC codes OBD1  >>

1996 and newer - DTC codes OBD2 >> https://www.obd-codes.com/trouble_codes/gm/obd_codes.htm

How to check for codes Caddyinfo How To Technical Archive >> http://www.caddyinfo.com/wordpress/cadillac-how-to-faq/

Cadillac History & Specifications Year by Year  http://www.motorera.com/cadillac/index.htm

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