CorvetteForum - Chevrolet Corvette Forum Discussion - 2004 Z06 Final Dyno with 3 different exhaust systems. All you ever wanted to know!

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2004 Z06 Final Dyno with 3 different exhaust systems. All you ever wanted to know!

Background of car on initial dyno last year (Blue Line):

2004 Z06
239000 km's
K+N CAI
B+B Route 66 mufflers
376 rwhp and 364 tq (Blue Line)

Now has BTR Stage 2 cam
new chromoly push rods
Pac double springs
pinned balancer
stock manifolds, stock mid pipe
B+B Route 66 mufflers
394 Rwhp and 375 Tq (Green Line)

Last week replaced the stock exhaust with:
2008 C6 Z06 exhaust manifolds
C6 Z06 cats
C6 Z06 mid pipe
B+B Route 66 mufflers
413 Rwhp and 388Tq (Yellow Line)

Yesterday installed:
Ebay Chinese knock off long tube headers($136.00) 1 7/8 into 3 inch collector
3 inch Catless matching Chinese mid pipe
B+B Route 66 mufflers
423 Rwhp and 401 Tq (Red Line)

So there you go. All your different exhaust systems dyno'd for you guys. The only thing I did not try was to punch the C6 Z06 cats and see what that would have made. The car is a monster with these Chinese headers and they fit perfect, no issues. A special thanks to Nick at AGP in Newmarket who put up with all my question and crap.

Any input would be much appreciated.

Thanks

Richard

Its not letting me post my dyno sheet???

Nice gains, thanks for taking the time to dyno and share your results.

Nice gains on the exhaust manifolds, stealth is always cool.
Youll probably get asked about noise difference with headers vs exh manifolds.

Whats your take?

Thanks for posting this!

Quote:

Originally Posted by NSFW (Post 1597974068)

Thanks for posting this!

The exhaust was dead quiet with the C6 Z06 manifolds/cats and mid pipe. Car now sounds wicked with the headers and no cats. Just a little smelly right now.

Quote:

Originally Posted by RockyMtC5 (Post 1597980140)

why don’t you dyno it now that your catless? I’m catless also but doesn’t smell that much on my Vette. I punched the cats out of one of my jeeps and it smells a lot more ;(

Sorry, don't understand the question? Punch out the stock C6 Z06 cats with the C6 Z06 exhaust??

Quote:

Originally Posted by ttchybrid (Post 1597980165)

Sorry, don't understand the question? Punch out the stock C6 Z06 cats with the C6 Z06 exhaust??

disregard, I I didn’t notice your last dyno was catless so right after I posted this I deleted it. Love what you did here testing the different exhaust options!

Great data!
I have a set of C6Z manifolds, cats and midpipe... how did you blend the 2 midpipes? Possible to just cut each and use reducer/clamps to mate them?

I cut the mid pipes about halfway back and installed the back half of a 3 inch mid pipe system that would regularily attach to long tube headers. Bought the mid pipe system off of ebay for $200.00. Like this one from ebay item# 162433014679