2 1/2" or 3" exhaust? - Page 2 - Camaro5 Chevy Camaro Forum / Camaro ZL1, SS and V6 Forums

BurnedRubber · 02-03-2016, 10:40 AM

i went with the full headers to tips system from texas speed. its 3 inch and sounds great! has magnaflow mufflers

Pro Stock John · 02-03-2016, 11:20 AM

Quote:

Originally Posted by BFASTNOTLAST

Just stating what I found out with my set-up. Everyone is different.

All good, I have no data and you do.

Magz_rule · 02-03-2016, 01:20 PM

Have an SS with a tvs on it. Had a 3" exhaust and switched to a 2.5" because I didn't like the way the 3" fit. No power loss on the dyno whatsoever. Actually made a bit more with a 2.5" (keep in mind the dynos were on different days and both with the same catless TSP longtubes).

/shrug

2012LS3VERT · 02-03-2016, 01:28 PM

I am running a 2.5" NPP exhaust at about 750rwhp. I had the 3" SW, but it was murdering my grounc clearance after spacing out my convertible bracing. No issues here with 2.5".

Camaro Dude · 02-03-2016, 07:47 PM

I would do 3 inch front to back if I was going Twin Turbo. 100%!

For anything less (NA), I'd mimic the Z28 2.75" size, and call it a day.

lechess · 02-04-2016, 10:10 AM

Well guys thanks alot for the help. I bought the corsa sport exhaust. my buddy and i knocked it out yesterday, the install was simple. I love the way it sounds completely diffeent sound than i had on past vehicles. Theres no drone at all. Its a little quiet but i think the lt headers will change that.

lechess · 02-04-2016, 10:15 AM

Now time for the headers. I will be ordering texas speed. Headers. As for the cats i was thinking about thunderbolt cats have you heard of them before?

tmaleck · 02-04-2016, 12:39 PM

Quote:

Originally Posted by 2012LS3VERT

I am running a 2.5" NPP exhaust at about 750rwhp. I had the 3" SW, but it was murdering my grounc clearance after spacing out my convertible bracing. No issues here with 2.5".

Where did you get clearance issues? My vert bracing has one spacer on each side at the diff, but no problems yet. I did not install it though, I had a shop do it and he tweaked the routing a bit.
Tim

2012LS3VERT · 02-04-2016, 02:46 PM

I have done quite a bit of exhaust work in the past, but I only had so much room. I was scraping the vert cross brace, the tunnel brace, and the rear diagonal bracing with the spacers I had to install. My car is 1.5" lower than stock, plus an additional 1" shorter from running the 19" wheels and tire setup.

Magna_Flow · 02-09-2016, 05:30 PM

2.5" will be perfect for 90% of the applications out there, including the SS. We do offer 2 kits for them in 3", but those are mainly designed for the high horsepower/race crowd.

jshaf · 02-09-2016, 05:50 PM

if there is any chance that you might get a Cam, super or turbo charging you will want 3' gives you the option of going B I G down the road. I have the typical air intake/LT's/hi-flows and tune. but there is alway a chance I could go big and I have the 3 inch SW Retro Chambered cat back already in place.

BlaqWhole · 02-10-2016, 07:23 AM

Every year the amount of hp that 2-1/2 inch exhausts will support gets higher and higher. It used to be around 400 hp, then it went up to 500, now its up to 700...soon people will be saying that 2-1/2 inch exhausts support well over 1000 hp easily. What people forget is that what a exhaust can "support" is different from what makes an engine more efficient. a 2-1/4 inch exhaust can "support" 700. But if you increased the size and made no other changes then you'd gain a significant amount more hp from that change alone. In other words, if you have a choice between 2-1/2 or 3 inch, go with 3 inch.

CammytheBeast · 02-10-2016, 04:27 PM

Personally I love the way my cammy sounds. I have the kooks 1 7/8 LT with high flow cats followed by the 3inch retro chambered exhaust by stainless works, I was reluctant at first because I thought it would be too loud because technically the exhaust has no mufflers but the piping itself has dimples throughout the pipes which is what also gives it a beautiful tone. I also have a big ass cam so it complements the sound but im telling you 3" sounds great especially this setup

Camaro Dude · 02-10-2016, 04:30 PM

Quote:

Originally Posted by BlaqWhole

Every year the amount of hp that 2-1/2 inch exhausts will support gets higher and higher. It used to be around 400 hp, then it went up to 500, now its up to 700...soon people will be saying that 2-1/2 inch exhausts support well over 1000 hp easily. What people forget is that what a exhaust can "support" is different from what makes an engine more efficient. a 2-1/4 inch exhaust can "support" 700. But if you increased the size and made no other changes then you'd gain a significant amount more hp from that change alone. In other words, if you have a choice between 2-1/2 or 3 inch, go with 3 inch.

Do you think the 2.75 on the Z28 was a compromise of sorts? Eg, ground clearance, cost, etc?

02-03-2016, 10:40 AM	#15
BurnedRubber Ben Rakers Drives: 2011 Camaro 2SS/RS Join Date: Oct 2014 Location: Illinois Posts: 405 View My Garage	i went with the full headers to tips system from texas speed. its 3 inch and sounds great! has magnaflow mufflers __________________ 2011 Camaro 2SS/RS K&N Blackhawk Cold air intake, Hawk Performance Ceramic pads, BAER drilled and slotted rotors, Side louver black faded inserts, Hurst Short Throw Shifter, BMR Trailing Arms, Elite Engineering Catch Can, MSD Spark Plug Wires, Texas Speed 1 7/8in Headers and cat back, High Flow Cats, 3 inch X-Pipe, Speed Dawg shift knob, Tuned by Nickey. And oh, its My first car. https://www.youtube.com/channel/UC_L...5jF6EQEoKDNQ2g

02-09-2016, 05:50 PM	#25
jshaf Montani Semper Liberi Drives: 2011 Black 2SS/RS w/ IOM stripes Join Date: Feb 2010 Location: Masontown, WV Posts: 4,841	if there is any chance that you might get a Cam, super or turbo charging you will want 3' gives you the option of going B I G down the road. I have the typical air intake/LT's/hi-flows and tune. but there is alway a chance I could go big and I have the 3 inch SW Retro Chambered cat back already in place. __________________ Stainless Works 1 7/8 Long Tude Headers, Stainless Works High Flow Cats, Stainless Works Retro Chambered Catback, Z/28 Air Intake, RDP Tuned, FR41 Chrome Rims, 1100W stereo, 35% Tint

02-03-2016, 01:20 PM	#17
Magz_rule Drives: 2011 Camaro SS Join Date: May 2014 Location: NY Posts: 180	Have an SS with a tvs on it. Had a 3" exhaust and switched to a 2.5" because I didn't like the way the 3" fit. No power loss on the dyno whatsoever. Actually made a bit more with a 2.5" (keep in mind the dynos were on different days and both with the same catless TSP longtubes). /shrug

02-03-2016, 01:28 PM	#18
2012LS3VERT Drives: 2012 2SSRS Vert, Black w/M6 Join Date: Jan 2013 Location: Montgomery, AL Posts: 1,265	I am running a 2.5" NPP exhaust at about 750rwhp. I had the 3" SW, but it was murdering my grounc clearance after spacing out my convertible bracing. No issues here with 2.5".

02-03-2016, 07:47 PM	#19
Camaro Dude Drives: ‘13 1LE Join Date: Jul 2013 Location: Earth Posts: 3,904	I would do 3 inch front to back if I was going Twin Turbo. 100%! For anything less (NA), I'd mimic the Z28 2.75" size, and call it a day.

02-04-2016, 10:10 AM	#20
lechess Drives: LS3 Join Date: Jun 2015 Location: san antonio Posts: 75	Well guys thanks alot for the help. I bought the corsa sport exhaust. my buddy and i knocked it out yesterday, the install was simple. I love the way it sounds completely diffeent sound than i had on past vehicles. Theres no drone at all. Its a little quiet but i think the lt headers will change that.

02-04-2016, 10:15 AM	#21
lechess Drives: LS3 Join Date: Jun 2015 Location: san antonio Posts: 75	Now time for the headers. I will be ordering texas speed. Headers. As for the cats i was thinking about thunderbolt cats have you heard of them before?

02-04-2016, 02:46 PM	#23
2012LS3VERT Drives: 2012 2SSRS Vert, Black w/M6 Join Date: Jan 2013 Location: Montgomery, AL Posts: 1,265	I have done quite a bit of exhaust work in the past, but I only had so much room. I was scraping the vert cross brace, the tunnel brace, and the rear diagonal bracing with the spacers I had to install. My car is 1.5" lower than stock, plus an additional 1" shorter from running the 19" wheels and tire setup.

02-09-2016, 05:30 PM	#24
Magna_Flow Drives: 2015 ZL1 Join Date: Jan 2015 Location: Oceanside, CA Posts: 313	2.5" will be perfect for 90% of the applications out there, including the SS. We do offer 2 kits for them in 3", but those are mainly designed for the high horsepower/race crowd.

02-10-2016, 07:23 AM	#26
BlaqWhole Account Suspended Drives: 2017 Camaro ZL1 A10 Join Date: May 2012 Location: NJ Posts: 7,692	Every year the amount of hp that 2-1/2 inch exhausts will support gets higher and higher. It used to be around 400 hp, then it went up to 500, now its up to 700...soon people will be saying that 2-1/2 inch exhausts support well over 1000 hp easily. What people forget is that what a exhaust can "support" is different from what makes an engine more efficient. a 2-1/4 inch exhaust can "support" 700. But if you increased the size and made no other changes then you'd gain a significant amount more hp from that change alone. In other words, if you have a choice between 2-1/2 or 3 inch, go with 3 inch.

02-10-2016, 04:27 PM	#27
CammytheBeast Drives: 2010 White Camaro 235/239 Join Date: Feb 2016 Location: Fort Lauderdale FL Posts: 5	Personally I love the way my cammy sounds. I have the kooks 1 7/8 LT with high flow cats followed by the 3inch retro chambered exhaust by stainless works, I was reluctant at first because I thought it would be too loud because technically the exhaust has no mufflers but the piping itself has dimples throughout the pipes which is what also gives it a beautiful tone. I also have a big ass cam so it complements the sound but im telling you 3" sounds great especially this setup