Stock muffler mod?
Thread Starter
Pro
Joined: Jun 2015
Posts: 729
Likes: 97
From: Lancaster NY
Stock muffler mod?
Is there a cheap and easy way to make the stock mufflers on an '06 C6 a little louder? Maybe drill something out? I plan on an NPP upgrade next year but looking for something in the mean time.
Thread Starter
Pro
Joined: Jun 2015
Posts: 729
Likes: 97
From: Lancaster NY
Safety Car
Joined: Sep 2005
Posts: 4,226
Likes: 643
From: Orange County Ca
Instructor
Joined: Aug 2012
Posts: 160
Likes: 3
From: Bellevue Nebraska
NE Events Coordinator
I did the one Sayfoo references. Skip to page 33-34 for instructions and pictures. Made it sound a bit louder (specially at WOT), little bit of cackle on downshift but no noticeable drone (2005 Convertible). Takes about 15 minutes to do the mod.
Thread Starter
Pro
Joined: Jun 2015
Posts: 729
Likes: 97
From: Lancaster NY
Intermediate
Joined: Sep 2013
Posts: 42
Likes: 0
From: Kalispell Montana
I did the drilling in mine tonight. Pretty straight forward. Went to Home Depot and bought a package of 3/4 inch electrical knock out seals, (plugs.) They actually fill a 1 1/16" hole. Also got a 1" bi-metal hole saw with arbor, pilot bit, and a new Milwalkee 1 1/8" step bit because I needed one for the shop anyway. Used the hole saw with some cutting oil to drill through the shell, then all the way through the inner pipe. The step bit cleaned up the outer hole and took off another 1/16". Used some high temp RTV around the outside edge of the hole before tapping in the plug. Want to give it time to cure before I really hit the high RPMs. But start up and light cruising sounds pretty good. Just a bit of rumble. It's a highway cruiser for me so don't want it sounding like my 71 Chevy K20 454 with dual Flowmasters!
Corvette Stories
The Best of Corvette for Corvette Enthusiasts
Top 10 Most Expensive Corvettes Ever Sold on Bring A Trailer
Brett Foote
10 Things Every Corvette Owner Needs (2026 Edition)
Michael S. Palmer
8 Most "Only Corvette Owners Understand" Quirks and Problems
Pouria Savadkouei
10 Reasons the C6 Z06 is Still A Performance Benchmark After 20 Years
Joe Kucinski
How Much Horsepower Every Corvette Engine "LOST" in 1972
Joe Kucinski
Top 10 DOs and DON'Ts for Protecting Your Convertible Top!
Michael S. Palmer
Top 10 Most Explosive Corvettes Ever Made: Power-to-Weight Ratio Ranked!
Joe Kucinski
150 hp to 1,250 hp: Every Corvette Generation Compared by the Specs That Matter
Joe Kucinski
8 Coolest Corvette Pace Cars (and Replicas) of All Time
Verdad Gallardo
Thread Starter
Pro
Joined: Jun 2015
Posts: 729
Likes: 97
From: Lancaster NY
I did the drilling in mine tonight. Pretty straight forward. Went to Home Depot and bought a package of 3/4 inch electrical knock out seals, (plugs.) They actually fill a 1 1/16" hole. Also got a 1" bi-metal hole saw with arbor, pilot bit, and a new Milwalkee 1 1/8" step bit because I needed one for the shop anyway. Used the hole saw with some cutting oil to drill through the shell, then all the way through the inner pipe. The step bit cleaned up the outer hole and took off another 1/16". Used some high temp RTV around the outside edge of the hole before tapping in the plug. Want to give it time to cure before I really hit the high RPMs. But start up and light cruising sounds pretty good. Just a bit of rumble. It's a highway cruiser for me so don't want it sounding like my 71 Chevy K20 454 with dual Flowmasters!
Intermediate
Joined: Sep 2013
Posts: 42
Likes: 0
From: Kalispell Montana
Put a few hundred miles on the last two days. Definitely like the start up and idle sound better. Does have a tone at 70 ssmike56. Not objectionable for my taste. Seems most evident at roughly 1500 rpms, which is about 70 for me. Louder when going uphill of course, silent going down, flat is about equivalent to a normal hum. Literally, like your humming! I like it. But if you're concerned you could try 3/4 inch first. Can always go bigger, but can't go smaller! Only issue I can foresee is you won't be able to use a bi-metal hole saw the second time. You'd need a step bit but I think I've only seen 7/8 and 1 1/8.
Thread Starter
Pro
Joined: Jun 2015
Posts: 729
Likes: 97
From: Lancaster NY
Put a few hundred miles on the last two days. Definitely like the start up and idle sound better. Does have a tone at 70 ssmike56. Not objectionable for my taste. Seems most evident at roughly 1500 rpms, which is about 70 for me. Louder when going uphill of course, silent going down, flat is about equivalent to a normal hum. Literally, like your humming! I like it. But if you're concerned you could try 3/4 inch first. Can always go bigger, but can't go smaller! Only issue I can foresee is you won't be able to use a bi-metal hole saw the second time. You'd need a step bit but I think I've only seen 7/8 and 1 1/8.
Thread Starter
Pro
Joined: Jun 2015
Posts: 729
Likes: 97
From: Lancaster NY
I just did the muffler mod and the car isn't even on the road yet! Lol! Waiting on the lean release from the bank. Ended up using a 1" all the way through. Sounds good. Just that little extra I was looking for. Thanks for everyone's help and especially the link! Much appreciated!
Burning Brakes
Joined: Mar 2012
Posts: 836
Likes: 43
From: Killeen Texas
http://killeen.craigslist.org/pts/5180767510.html