Supercharger + 3" x pipe + 2.5" axle back, good or bad? - Camaro5 Chevy Camaro Forum / Camaro ZL1, SS and V6 Forums

T-r3x · 01-11-2014, 08:37 AM

Hey guys!

I'll get my supercharger installed next week

and I have a question
I have an ARH installed and a 2.5" Borla cat-back.
I was wondering if I can get a ARH 3" pipes with X pipe and weld the 2.5" Borla Axle back to it to increase the air flow of the exhaust.

Just like in this pictures

Will that effect the air flow of the exhaust in a good way? specially with the supercharger?
Is it good to do what I'm planing to do ,or should I just keep my 2.5" cat back?

please let me know what's the best choice :no idea:

Thanks guys!

Iam Broke · 01-11-2014, 10:58 AM

Unless you are going 700 whp, I wouldn't worry about it.

Birm · 01-11-2014, 01:03 PM

2.5" pipe is fine for your mod's and for most mods beyond that. No point in swapping out in my opinion.

BlaqWhole · 01-11-2014, 01:11 PM

I have to disagree. 2.5 inch is ok on my N/A bolt-on 03 Mustang GT. But 3 inch is better on my Camaro. I'd say go 3 inches all the way back.

*The_Blur* · 01-11-2014, 01:17 PM

You might as well go 3" all the way, especially if you plan to add more power later.

62nalide · 01-11-2014, 01:35 PM

I'm running the similar setup but LG headers with 3" x-pipe necked down to the stock L99 mufflers 2.5" so far so good.

axis · 01-11-2014, 03:03 PM

Adding a 3in X pipe won't increase flow if the piping after it is 2.5in. Your exhaust will only flow as much as the narrowest point will allow. If you want more flow, you'll have to go 3in all the way back.

Apex Motorsports · 01-11-2014, 03:47 PM

Quote:

Originally Posted by T-r3x

Hey guys!

I'll get my supercharger installed next week

and I have a question
I have an ARH installed and a 2.5" Borla cat-back.
I was wondering if I can get a ARH 3" pipes with X pipe and weld the 2.5" Borla Axle back to it to increase the air flow of the exhaust.

Just like in this pictures

Will that effect the air flow of the exhaust in a good way? specially with the supercharger?
Is it good to do what I'm planing to do ,or should I just keep my 2.5" cat back?

please let me know what's the best choice :no idea:

Thanks guys!

It can be done but there isn't really any point if you are only doing part of the exhaust in 3 inch. Do 3 inch all the way back or leave it as is.

thahemp · 01-11-2014, 06:11 PM

I forget who told me this.. 14pilot maybe? A small neck down... say a 3" to 2.5" midpipe, back into a 2.5" to 3" flare UP to a 3" catback can actually be beneficial for low-end torque. Helps get the velocity up right out of the headers at low RPM, but still no restriction back to the wheels for high end flow.

T-r3x · 01-12-2014, 07:26 AM

Looks like i'm going to keep my 2.5"
Thanks all

T-r3x · 01-12-2014, 10:05 AM

Does the power difference worth paying about $1500 for a new 3" cat back instead of my 2.5"?

Bo White · 01-12-2014, 10:20 AM

I gained going from 2.5 to 3 but it was the stock catback I was replacing. If I already had an aftermarket 2.5 catback I wouldn't worry with it.

T-r3x · 01-12-2014, 03:02 PM

Quote:

Originally Posted by Bo White

I gained going from 2.5 to 3 but it was the stock catback I was replacing. If I already had an aftermarket 2.5 catback I wouldn't worry with it.

DO YOU THINK I'LL GET MUCH MORE POWER WITH THE 3" CATBACK?

thahemp · 01-12-2014, 03:54 PM

Quote:

Originally Posted by T-r3x

DO YOU THINK I'LL GET MUCH MORE POWER WITH THE 3" CATBACK?

NO!

01-11-2014, 08:37 AM	#1
T-r3x Drives: 2010 camaro ss ( LS3 ) Join Date: Apr 2011 Location: Ksa Posts: 150	Supercharger + 3" x pipe + 2.5" axle back, good or bad? Hey guys! I'll get my supercharger installed next week and I have a question I have an ARH installed and a 2.5" Borla cat-back. I was wondering if I can get a ARH 3" pipes with X pipe and weld the 2.5" Borla Axle back to it to increase the air flow of the exhaust. Just like in this pictures Will that effect the air flow of the exhaust in a good way? specially with the supercharger? Is it good to do what I'm planing to do ,or should I just keep my 2.5" cat back? please let me know what's the best choice :no idea: Thanks guys! Last edited by T-r3x; 01-11-2014 at 08:55 AM. Reason: Adding pics

01-11-2014, 10:58 AM	#2
Iam Broke PHAT B33 Drives: 2012 TF3 Camaro 2SS/RS M6 Join Date: Jun 2012 Location: Dark of the Moon Posts: 1,460 View My Garage	Unless you are going 700 whp, I wouldn't worry about it. __________________ Another 1 of 371 '12 T3 LS3 M6's built.

01-11-2014, 01:17 PM	#5
The_Blur Moderator Drives: 2018 Harley-Davidson Street Bob Join Date: Nov 2007 Location: San Diego Posts: 14,769	Supercharger + 3" x pipe + 2.5" axle back, good or bad? You might as well go 3" all the way, especially if you plan to add more power later. __________________ RDP Motorsport//GEN5DIY//Cultrag Performance//JPSS//Rodgets Chevrolet// Operation Demon//Buy at Invoice//RACECARWEAR RESPECT ALL CARS. LOVE YOUR OWN. warn 145:159 ban

01-11-2014, 01:35 PM	#6
62nalide Drives: 2013 SS Join Date: May 2013 Location: DFW Posts: 4,102	I'm running the similar setup but LG headers with 3" x-pipe necked down to the stock L99 mufflers 2.5" so far so good. __________________ https://frankensteined.net/ Martin@Frankensteined.net

01-11-2014, 03:03 PM	#7
axis Search Ninja Drives: 2010 Black 2SS/RS A6 Join Date: Oct 2009 Location: Central Ark Posts: 7,183	Adding a 3in X pipe won't increase flow if the piping after it is 2.5in. Your exhaust will only flow as much as the narrowest point will allow. If you want more flow, you'll have to go 3in all the way back. __________________ 2010 Black 2SS/RS A6 Halltech CF 102 fed GPI modded intake manifold Bo (knows) White ported TB Kooks LT's/ Dynomax VT Pfadted (springs/sways) Dyno tuned by Rhino and GPI I once parallel parked a train.

01-11-2014, 01:03 PM	#3
Birm Drives: Florida Speed & Power Join Date: Jan 2011 Location: Pinellas Park, FL Posts: 3,185	2.5" pipe is fine for your mod's and for most mods beyond that. No point in swapping out in my opinion.

01-11-2014, 01:11 PM	#4
BlaqWhole Account Suspended Drives: 2017 Camaro ZL1 A10 Join Date: May 2012 Location: NJ Posts: 7,692	I have to disagree. 2.5 inch is ok on my N/A bolt-on 03 Mustang GT. But 3 inch is better on my Camaro. I'd say go 3 inches all the way back.

01-11-2014, 06:11 PM	#9
thahemp Geek Drives: 2012 Black LS3 Join Date: Jan 2012 Location: Derby, KS Posts: 4,343 View My Garage	I forget who told me this.. 14pilot maybe? A small neck down... say a 3" to 2.5" midpipe, back into a 2.5" to 3" flare UP to a 3" catback can actually be beneficial for low-end torque. Helps get the velocity up right out of the headers at low RPM, but still no restriction back to the wheels for high end flow. __________________ 01000111011011110110111101100100001000000110110001 11010101100011011010110010000001110111011010010111 01000110100000100000011101000110100001101001011100 110010000001101111011011100110010100100001 x = ac97968bd3df8f968c8cd3df998a9c94d3df9c8a918bd3df9c 909c94df8c8a9c949a8dd3df92908b979a8ddf998a9c949a8d d3df8b968b8cd1 x = ~x

01-12-2014, 07:26 AM	#10
T-r3x Drives: 2010 camaro ss ( LS3 ) Join Date: Apr 2011 Location: Ksa Posts: 150	Looks like i'm going to keep my 2.5" Thanks all

01-12-2014, 10:05 AM	#11
T-r3x Drives: 2010 camaro ss ( LS3 ) Join Date: Apr 2011 Location: Ksa Posts: 150	Does the power difference worth paying about $1500 for a new 3" cat back instead of my 2.5"?

01-12-2014, 10:20 AM	#12
Bo White Drives: 2015 Summit White 2SS 1LE Join Date: Feb 2012 Location: Vance Alabama Posts: 8,017	I gained going from 2.5 to 3 but it was the stock catback I was replacing. If I already had an aftermarket 2.5 catback I wouldn't worry with it. __________________ Retired wanna be cylinder head porter 2015 2SS 1LE Clutch reservoir, Vararam DRX, ported TB, TSP 2" headers, MGW shifter Totalled: 2010 1SS Wilkes Performance/Eagle 416 shortblock, TSP custom valvetrain, PRC 260 heads, Edelbrock Pro Flo 102, th400 swap, 8" PTC 5500 stall= 535/435 at the wheels tuned Gen 3 Performance and Dyno 10.97 @ 124 full weight in 3100 DA CamaroFest X