High flow cats? - Camaro5 Chevy Camaro Forum / Camaro ZL1, SS and V6 Forums

Bubbafire88 · 02-24-2021, 01:31 PM

Hi, I just bought my 2010 camaro 1ss/rs auto a little over a month ago and It came with a borla axle back, h-pipe and an afe power intake, I bought an sct tuner for a a couple weeks ago from rdp store and I’m getting some speed engineering headers and I was wondering if I should just spend the extra money on some high flow cats because I live in Texas and they don’t allow cat less cars, and I’m not sure which high flows to go with or if I should just stick with the stock cats.

InFiD3ViL · 02-24-2021, 01:52 PM

If you live in an area with emissions inspections or smog testing, then yes, get the cats.

But if there is no chance you will be tested, visual or probe, you can likely safely run catless. Just beware it will be a little louder/raspier and a LOT stinkier. Personally, I love that smell though, but it sticks to your clothes. The horsepower gain from going catless with long tubes is negligible. Some people run high flow cats just because it can clean up the exhaust sound a little bit onb long tubes, depending on your exhaust of course.

And just for the record, NO state allows removing the cats or tampering with emissions equipment. It's just a matter of enforcement and how your state handles it. I live in Florida where it's a no mans land and inspections are unheard of. If we had safety or emissions inspections we would probably lose 30%+ of the cars on the road down here.

gunchamp · 02-24-2021, 01:53 PM

Bail the stock cats for high flows for sure. Bunch of universals out there that are fine. Many in the $100 range. Does Texas actually have emissions or any kind of checks?

gunchamp · 02-24-2021, 01:53 PM

Quote:

Originally Posted by InFiD3ViL

If you live in an area with emissions inspections or smog testing, then yes, get the cats.

But if there is no chance you will be tested, visual or probe, you can likely safely run catless. Just beware it will be a little louder/raspier and a LOT stinkier. Personally, I love that smell though, but it sticks to your clothes. The horsepower gain from going catless with long tubes is negligible.

And just for the record, NO state allows removing the cats or tampering with emissions equipment. It's just a matter of enforcement and how your state handles it. I live in Florida where it's a no mans land and inspections are unheard of. If we had safety or emissions inspections we would probably lose 30%+ of the cars on the road down here.

Posted at the same time lol and thats where I was going. Mine are gone as its not enforced here

pyroguy · 02-24-2021, 02:44 PM

If you need high flow cats you should get high flow cats. Smog tests will definitely rat you out, but if you don't have a sniffer test you'll fail the visual test.

If you have long tube headers you cannot utilize the stock cats. Check out Texas Speed for high flow cats. Most people who have bought Speed Engineering headers and need cats go with their high flow cats.

Side note, for those who are considering budget friendly long tubes but need high flow cats, you can't beat OBX.

Avenging Orange · 02-24-2021, 03:58 PM

If you are buying from Speed Engineering...why not get their cats too?

saluki · 02-24-2021, 04:52 PM

Quote:

Originally Posted by pyroguy

If you need high flow cats you should get high flow cats. Smog tests will definitely rat you out, but if you don't have a sniffer test you'll fail the visual test.

If you have long tube headers you cannot utilize the stock cats. Check out Texas Speed for high flow cats. Most people who have bought Speed Engineering headers and need cats go with their high flow cats.

Side note, for those who are considering budget friendly long tubes but need high flow cats, you can't beat OBX.

texas speeds offroad pipes look just like high flow cats if he only has the visual inspection.

pyroguy · 02-24-2021, 06:56 PM

Quote:

Originally Posted by Avenging Orange

If you are buying from Speed Engineering...why not get their cats too?

Because Speed Engineering doesn't sell cats.

0stones0 · 02-24-2021, 08:53 PM

Quote:

Originally Posted by InFiD3ViL

....

Some people run high flow cats just because it can clean up the exhaust sound a little bit onb long tubes, depending on your exhaust of course.

....

Exactly why I went with high flows. Haven’t fired it up yet but, hoping it also will help with possible drone issues at certain rpm’s.

RupertPupkin · 02-24-2021, 08:56 PM

Wtf... I thought Texas didn’t have emissions. If they do, then I have to rethink moving down there.

Avenging Orange · 02-24-2021, 10:01 PM

Quote:

Originally Posted by pyroguy

Because Speed Engineering doesn't sell cats.

How dare they make their mid pipes look amazingly like high flow cats!

https://www.speed-engineering.com/sh...ion-pipes.html

pyroguy · 02-24-2021, 10:04 PM

Quote:

Originally Posted by Avenging Orange

How dare they make their mid pipes look amazingly like high flow cats!

https://www.speed-engineering.com/sh...ion-pipes.html

They may look like them, but they aren't. It's an attempt to let their end users fool the visual inspectors. However, a tap on them will indicate that they are hollow.

Avenging Orange · 02-24-2021, 10:10 PM

Quote:

Originally Posted by pyroguy

They may look like them, but they aren't. It's an attempt to let their end users fool the visual inspectors. However, a tap on them will indicate that they are hollow.

Sneaky little devils. Whatever gets the job done.

morepowerjoe · 02-25-2021, 12:45 AM

Here in Texas there is no sniff test. As far as a visual inspection, they don't really do anything except plug into the obd port and as long as you don't have any codes your good USUALLY. Now if you have an exhaust that is loud as hell they might take a look but probably not likely. I would say if your worried about it I would go with cats but I'm not going to worry about it. The shop that I'm going to get to do my tune asked me if I was going to run cats or not and I told him no and alls he said was that will sound good. So I think it just depends on where you go.

02-24-2021, 01:31 PM	#1
Bubbafire88 Drives: 2010 Camaro ss A6 "Chief" Join Date: Dec 2020 Location: Pearland texas Posts: 53 View My Garage	High flow cats? Hi, I just bought my 2010 camaro 1ss/rs auto a little over a month ago and It came with a borla axle back, h-pipe and an afe power intake, I bought an sct tuner for a a couple weeks ago from rdp store and I’m getting some speed engineering headers and I was wondering if I should just spend the extra money on some high flow cats because I live in Texas and they don’t allow cat less cars, and I’m not sure which high flows to go with or if I should just stick with the stock cats.

02-24-2021, 01:52 PM	#2
InFiD3ViL Drives: 2010 CGM 2SS/RS LS3 Swapped A6 Join Date: Sep 2016 Location: Spring Hill, FL Posts: 4,573	If you live in an area with emissions inspections or smog testing, then yes, get the cats. But if there is no chance you will be tested, visual or probe, you can likely safely run catless. Just beware it will be a little louder/raspier and a LOT stinkier. Personally, I love that smell though, but it sticks to your clothes. The horsepower gain from going catless with long tubes is negligible. Some people run high flow cats just because it can clean up the exhaust sound a little bit onb long tubes, depending on your exhaust of course. And just for the record, NO state allows removing the cats or tampering with emissions equipment. It's just a matter of enforcement and how your state handles it. I live in Florida where it's a no mans land and inspections are unheard of. If we had safety or emissions inspections we would probably lose 30%+ of the cars on the road down here. __________________ 2010 CGM Camaro 2SS LS3 Swapped A6 - GPI LS3 SS1 .647/.638, (224/237, 112 +4, 7º overlap) on CamMotion 8620 core, BTR Platinum .660" Dual Spring kit w/titanium retainers, CHE bronze trunnion upgrade, stock heads milled @ .015, Melling HV 10296 oil pump, TSP 1-7/8" long tube headers (W/Catless Off-road Pipes), Corsa Xtreme 3" Catback, GPI Ported/Rod Mod Intake, Stage 2 Ported Throttle Body, Vararam OTR CAI, Mike Norris Gen 2 catch can + GM 1LE clean side separator, 160º thermostat - Megan Racing adjustable coilovers (lowered 1.75"), MRR M017 10/11" wheels-Tuned by Ryan @ GPI

02-24-2021, 01:53 PM	#3
gunchamp Drives: 15 Camaro SS Join Date: Oct 2018 Location: Mountains of central PA Posts: 1,442	Bail the stock cats for high flows for sure. Bunch of universals out there that are fine. Many in the $100 range. Does Texas actually have emissions or any kind of checks? __________________ 15 Camaro SS- GPI max top end, ESS Vortech V3 9psi, ID 1050s, ZL1 pump, JMS bap, Long tubes, Corsa extreme, Circle D pro 5C, 391 rear, DSS carbon drive shaft, poly cradle bushings, tuned by Ted Jannetty and much much more

02-24-2021, 02:44 PM	#5
pyroguy Started#gottalovethatblue Drives: ABM #831 Join Date: Apr 2013 Location: TN Posts: 6,918 View My Garage	If you need high flow cats you should get high flow cats. Smog tests will definitely rat you out, but if you don't have a sniffer test you'll fail the visual test. If you have long tube headers you cannot utilize the stock cats. Check out Texas Speed for high flow cats. Most people who have bought Speed Engineering headers and need cats go with their high flow cats. Side note, for those who are considering budget friendly long tubes but need high flow cats, you can't beat OBX. __________________ '10 Camaro 2SS/RS \| Aqua Blue #831 of 3,903 \| Silver Stripes Check out my build thread

02-24-2021, 03:58 PM	#6
Avenging Orange Drives: 2010 Inferno Orange 2SS/RS Join Date: Apr 2010 Location: Clermont, IN Posts: 3,297	If you are buying from Speed Engineering...why not get their cats too? __________________ 2010 Inferno Orange 2SS/RS M6 Black Leather, Sun Roof, OBX Headers, Borla touring axle back, Cold Air Inductions CAI , non synthetic fluids, BMR total bushing upgrade/1" lowering springs, DSE 32mm rear sway bar. GM fe4 shocks/struts/LCA's, AAM 3.91 diff, Vertini RFS1.8 20x9 +30. Conti ExtremeContact Sport 275/35/20. sjm autoprod ABL dash kit. Mike Norris tuned 413/419. Avenging Orange: 43 years of not buying into the Hype........and damn proud of it!! https://youtu.be/9JD9it6SmB8 https://youtu.be/xmelTlEzI34 KICKING CANCERS ASS SINCE 2015!!

02-24-2021, 08:56 PM	#10
RupertPupkin Drives: 2014 Camaro SS 1Le Join Date: Feb 2016 Location: IL Posts: 1,591	Wtf... I thought Texas didn’t have emissions. If they do, then I have to rethink moving down there. __________________ 2014 SS 1LE Money Pit/ Forged 402 CAM 22X/24X, .619/.617, 113 LSA/ LS9 Heads FIC 1200cc/DSX Aux Pump//McLeod RXT Clutch 730whp: 630Trq

02-25-2021, 12:45 AM	#14
morepowerjoe Drives: 2012 Chevrolet Camaro l99 Join Date: Aug 2020 Location: Austin, TX Posts: 2,103	Here in Texas there is no sniff test. As far as a visual inspection, they don't really do anything except plug into the obd port and as long as you don't have any codes your good USUALLY. Now if you have an exhaust that is loud as hell they might take a look but probably not likely. I would say if your worried about it I would go with cats but I'm not going to worry about it. The shop that I'm going to get to do my tune asked me if I was going to run cats or not and I told him no and alls he said was that will sound good. So I think it just depends on where you go. __________________ DSS FX Forged Pistons, Eagle ESP L19 Forged Rods, ARP Head and Main Studs, TSP PRC 260 CNC Ported Heads milled .030, Cometic .040 Head Gaskets, GPI SS3 VVT Camshaft, GM Performance Racing Lifters, CHE Trunnions , Molly Pushrods, Melling 10355HV Oil Pump, Cold Air Inductions CAI, Fast LSXR Intake Manifold, Nick Williams 103 TB, TSP 1 7/8" Longtubes with 3" TSP Exhaust, ZL1 Fuel Pump, Mishimoto Radiator, Mishimoto Oil Cooler, Tru Cool 40k Tranny Cooler, 3600 Circle D Converter, Fluid Dynamics Balancer Build Thread https://www.camaro5.com/forums/showthread.php?t=609817