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Camaro V8 LS3 / L99 Engine, Exhaust, and Bolt-Ons Bolt-Ons | Intakes | Exhaust

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Old 05-21-2013, 04:37 PM   #1
CamaroDIYking
 
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Whatchu talkin' 'bout Willis?

Can y'all do me a favor ? I bought a Camaro back in November, well it has a Dynomax cat back exhaust...it is connected to the stock headers...does that mean it is a 2.5 or 3 inch cat back? The guy told me it was 3 inch when I bought the car...but how could that be if it's stock headers? Any help would be greatly appreciated.
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Lighting- LED footwell, grille, trunk, and engine lights done via DIY. LED dome, DRL, and tag lights.
Paint- Painted engine cover, steering wheel bezel, speedometer bezel, front bowtie, tail light bezels, wheel center caps.
Exterior lights- tinted tail lights and sidemarker lights.
Wheels- powdercoated stock RS 20' wheels black
Exhaust- Cat-back Dynomax Bullet Exhaust system with bullet muffler delete.
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Old 05-21-2013, 11:20 PM   #2
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Post up a few pics of the pipes!
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Old 05-21-2013, 11:42 PM   #3
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yea gonna need to see where it connects to the stock cats
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Old 05-21-2013, 11:44 PM   #4
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Will upload tomorrow. Thanks guys
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2010 2SS/RS- every option possible in 2010

Lighting- LED footwell, grille, trunk, and engine lights done via DIY. LED dome, DRL, and tag lights.
Paint- Painted engine cover, steering wheel bezel, speedometer bezel, front bowtie, tail light bezels, wheel center caps.
Exterior lights- tinted tail lights and sidemarker lights.
Wheels- powdercoated stock RS 20' wheels black
Exhaust- Cat-back Dynomax Bullet Exhaust system with bullet muffler delete.
Misc- rear blackout kit from Big Worm Graphix, black side Camaro lettering from Emblem Pros, and rear Camaro lettering from Emblem Pros.
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Old 05-22-2013, 12:18 AM   #5
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To answer your last question. Most 3in catbacks neck down to 2.5 to accept the OEM 2.5in midpipes (cat section) unless you specify that you want it 3in through and through.
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Old 05-22-2013, 01:42 AM   #6
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when you get the pics up someone here will let you know, but my gut feeling is that its a 2 1/2 inch.
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Old 05-22-2013, 02:52 AM   #7
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Dynomite!!!

There's another 80s phrase for ya.
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Old 05-22-2013, 09:34 AM   #8
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Dynomite!!!

There's another 80s phrase for ya.
Since we're playing the game.

Nanu Nanu

By the power of Greyskull
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Old 05-22-2013, 10:21 AM   #9
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Quote:
Originally Posted by CamaroDIYking View Post
Can y'all do me a favor ? I bought a Camaro back in November, well it has a Dynomax cat back exhaust...it is connected to the stock headers...does that mean it is a 2.5 or 3 inch cat back? The guy told me it was 3 inch when I bought the car...but how could that be if it's stock headers? Any help would be greatly appreciated.
Finding out should be easy. Look at the exhaust. If it is the same diameter from the catted connection all the way to the back of the exhaust then it is 2.5 inches. If it connects to the cats and then gets bigger, then it is a 3 inch.
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Old 05-22-2013, 11:07 AM   #10
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look for a step down in the mid section of the pipe. going from 2.5 to 3. if it same size all the way then its more then likely a 2.5
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Old 05-22-2013, 12:28 PM   #11
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Quote:
Originally Posted by axis View Post
To answer your last question. Most 3in catbacks neck down to 2.5 to accept the OEM 2.5in midpipes (cat section) unless you specify that you want it 3in through and through.
Quote:
Originally Posted by drayco513 View Post
look for a step down in the mid section of the pipe. going from 2.5 to 3. if it same size all the way then its more then likely a 2.5


Feel free to call, PM or email me anytime with questions.

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Old 05-22-2013, 01:11 PM   #12
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You can see where it goes up in size. That's a three inch, correct?
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2010 2SS/RS- every option possible in 2010

Lighting- LED footwell, grille, trunk, and engine lights done via DIY. LED dome, DRL, and tag lights.
Paint- Painted engine cover, steering wheel bezel, speedometer bezel, front bowtie, tail light bezels, wheel center caps.
Exterior lights- tinted tail lights and sidemarker lights.
Wheels- powdercoated stock RS 20' wheels black
Exhaust- Cat-back Dynomax Bullet Exhaust system with bullet muffler delete.
Misc- rear blackout kit from Big Worm Graphix, black side Camaro lettering from Emblem Pros, and rear Camaro lettering from Emblem Pros.
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Old 05-22-2013, 01:24 PM   #13
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Yep!
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Old 05-22-2013, 01:42 PM   #14
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Yep. 3"

Captain caveman!

Go go gadget 3" exhaust!
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Old 05-22-2013, 01:45 PM   #15
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Yes it is indeed 3"

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Old 05-22-2013, 02:24 PM   #16
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If I were to get 1 3/4 or 1 7/8 headers, would I have to change exhausts?
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2010 2SS/RS- every option possible in 2010

Lighting- LED footwell, grille, trunk, and engine lights done via DIY. LED dome, DRL, and tag lights.
Paint- Painted engine cover, steering wheel bezel, speedometer bezel, front bowtie, tail light bezels, wheel center caps.
Exterior lights- tinted tail lights and sidemarker lights.
Wheels- powdercoated stock RS 20' wheels black
Exhaust- Cat-back Dynomax Bullet Exhaust system with bullet muffler delete.
Misc- rear blackout kit from Big Worm Graphix, black side Camaro lettering from Emblem Pros, and rear Camaro lettering from Emblem Pros.
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Old 05-22-2013, 02:46 PM   #17
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Quote:
Originally Posted by CamaroDIYking View Post
If I were to get 1 3/4 or 1 7/8 headers, would I have to change exhausts?
Not if you get LT's with a factory connect.
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Old 05-22-2013, 03:20 PM   #18
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Quote:
Originally Posted by CamaroDIYking View Post
If I were to get 1 3/4 or 1 7/8 headers, would I have to change exhausts?
No not at all. You would have 2 options:

1. Go for 2.5" connection pipes (a 3" to 2.5" reduction happens at the cat.)
2. Go for 3" connection pipes, and have an exhaust shop replace that small section of 2.5" piping with 3" for a true 3" exhaust. Although unless you are pushing a lot of power, you would never notice the difference..

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Old 05-22-2013, 09:02 PM   #19
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What if I wanted to install NoWeeds exhaust diverters? Would I need 2.5 or 3 inch kit?
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2010 2SS/RS- every option possible in 2010

Lighting- LED footwell, grille, trunk, and engine lights done via DIY. LED dome, DRL, and tag lights.
Paint- Painted engine cover, steering wheel bezel, speedometer bezel, front bowtie, tail light bezels, wheel center caps.
Exterior lights- tinted tail lights and sidemarker lights.
Wheels- powdercoated stock RS 20' wheels black
Exhaust- Cat-back Dynomax Bullet Exhaust system with bullet muffler delete.
Misc- rear blackout kit from Big Worm Graphix, black side Camaro lettering from Emblem Pros, and rear Camaro lettering from Emblem Pros.
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Old 05-22-2013, 09:22 PM   #20
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Quote:
Originally Posted by CamaroDIYking View Post
What if I wanted to install NoWeeds exhaust diverters? Would I need 2.5 or 3 inch kit?
3"
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Old 05-22-2013, 10:08 PM   #21
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But how would it connect to the 2.5 inch NoWeeds?
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2010 2SS/RS- every option possible in 2010

Lighting- LED footwell, grille, trunk, and engine lights done via DIY. LED dome, DRL, and tag lights.
Paint- Painted engine cover, steering wheel bezel, speedometer bezel, front bowtie, tail light bezels, wheel center caps.
Exterior lights- tinted tail lights and sidemarker lights.
Wheels- powdercoated stock RS 20' wheels black
Exhaust- Cat-back Dynomax Bullet Exhaust system with bullet muffler delete.
Misc- rear blackout kit from Big Worm Graphix, black side Camaro lettering from Emblem Pros, and rear Camaro lettering from Emblem Pros.
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Old 05-22-2013, 10:37 PM   #22
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But how would it connect to the 2.5 inch NoWeeds?
It doesn't. The diverters connect to the 3 inch piping of the 3 inch exhaust.
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Old 05-22-2013, 10:43 PM   #23
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Ok. Thanks!
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2010 2SS/RS- every option possible in 2010

Lighting- LED footwell, grille, trunk, and engine lights done via DIY. LED dome, DRL, and tag lights.
Paint- Painted engine cover, steering wheel bezel, speedometer bezel, front bowtie, tail light bezels, wheel center caps.
Exterior lights- tinted tail lights and sidemarker lights.
Wheels- powdercoated stock RS 20' wheels black
Exhaust- Cat-back Dynomax Bullet Exhaust system with bullet muffler delete.
Misc- rear blackout kit from Big Worm Graphix, black side Camaro lettering from Emblem Pros, and rear Camaro lettering from Emblem Pros.
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