Best High Flow Catalytic Converter

Category: catalytic converter 👁 330 👍 8 ★★★★☆4

Yes in the sense that they allow for the more efficient flow of exhaust gasses, removing restrictions that can impede performance. Vehicle owners who've significantly upgraded their engine power output (say, by adding a Stage 3 EST Power Pack) will notice more power by upgrading.

Quite as, do high flow cats add horsepower?

The amount of horsepower you will get from a high flow catalytic converter depends on your engine and the modifications you have made to it. You may see a horsepower gain of as little as 5 hp or as much as 60 hp. You may also get an extra 5-60 ft lbs of torque.

One may also ask, does a high flow cat increase sound? Yes, high flow cats are less restrictive than stock and will allow more sound to pass through your exhaust system.

Although, will high flow cats throw a code?

Yep, hi-flow cats will throw codes 99% of the time.

Do high flow cats smell?

High flows are called high flows for a reason. They flow exhaust fumes at a much higher rate, therefore a lot less "smell" (fumes) get trapped in the cats. "It works 60% of the time, every time."

BESTSELLER NO. 1 in 2021

AUTOSAVER88 ATCC0007 2.5" Inlet/Outlet Universal Catalytic Converter with O2 Port (EPA Compliant)

AUTOSAVER88 ATCC0007 2.5
  • AUTOSAVER88 brand new universal fit catalytic converter is designed to meet or even exceed OE quality and performance standards without sacrificing flow rate.
  • Features heavy-duty stainless steel construction, internal ceramic substrates and catalyst coating have been carefully engineered for maximum efficiency.
  • Standard 2.5" inside diameter inlet/outlet, 11" overall length, universal for vehicles with 2.5 inches outer diameter exhaust pipe.
  • Genuine EPA certification, every catalytic converter body is stamped with exclusive EPA number. Federal EPA standard catalytic converters are backed 5 years or 50,000 miles limited warranty.
  • Non CARB compliant ( illegal for use in California ), OBD II compliant ( for 1996 and newer vehicles ); Installing may require cutting and welding, please consider professional operation.
BESTSELLER NO. 2 in 2021

Set of 2, 2.5inch Universal High Flow Catalytic Converter Stainless Steel 410250 CAT

Set of 2, 2.5inch Universal High Flow Catalytic Converter Stainless Steel 410250 CAT
  • Engine Limit: 5.9L / Test Weight: 6000 Lbs.
  • Ideal for use on vehicles prior to 1998 Vehicles after 1998 that require an O2 Port
  • Part Number: 410250 / Inlet: 2.5" / Outlet: 2.5" / Overall Length: 11"
  • Model: Universal Converter & Material: T409 Stainless Steel & Substrate: Ceramic - 400 cell
  • Professional installation is highly recommended (No Instruction Included)
BESTSELLER NO. 3 in 2021

AUTOSAVER88 ATCC0010 3" Inlet/Outlet Universal Fit Catalytic Converter (EPA Compliant)

AUTOSAVER88 ATCC0010 3
  • AUTOSAVER88 brand new universal fit catalytic converter is designed to meet or even exceed OE quality and performance standards without sacrificing flow rate.
  • Features heavy-duty stainless steel construction, internal ceramic substrates and catalyst coating have been carefully engineered for maximum efficiency.
  • Standard 3" inside diameter inlet/outlet, 11" overall length, universal for vehicles with 3.0 inches outer diameter exhaust pipe.
  • Genuine EPA certification, every catalytic converter body is stamped with exclusive EPA number. Federal EPA standard catalytic converters are backed 5 years or 50,000 miles limited warranty.
  • Non CARB compliant ( illegal for use in California ), OBD II compliant ( for 1996 and newer vehicles ); Installing may require cutting and welding, please consider professional operation.
BESTSELLER NO. 4 in 2021

Flowmaster 2000130 Catalytic Converter Univ 200 Srs. Metal H.F. 3.00"

Flowmaster 2000130 Catalytic Converter Univ 200 Srs. Metal H.F. 3.00
  • High Flow 200 Cell Metallic Substrate
  • Severe-duty/High Temperature
  • Stainless Steel Spun Body
  • Compact Size and Shape
  • Quick and Easy Installation
BESTSELLER NO. 5 in 2021

GESI G-Sport High Flow Catalytic Converter (2.5" IN/OUT x 4" Body Non EPA)

GESI G-Sport High Flow Catalytic Converter (2.5
BESTSELLER NO. 6 in 2021

Thunderbolt 2 1/4" Inlet/Outlet Universal Spun Catalytic Converter, 4" Round, 11" Long, High-Flow, Stainless Steel, OBDII Compliant

Thunderbolt 2 1/4
  • NEW GENERATION SPUN FORMED CONVERTER: Made of one piece of polished stainless steel, our products have zero leakage and fit tight applications
  • PRODUCT SPECIFICATIONS: 2 & 3 Way 5.9L / 6,000 lbs
  • UNIVERSAL: Designed to cover a wide variety of vehicle makes and models
  • PRODUCT DIMENSIONS: 4" Round, 11" Long, 2 1/4" Inlet/Outlet
  • OBDII Compliant: Excluding California
BESTSELLER NO. 7 in 2021

Catalytic Converter Compatible with 1999-2007 Chevy Silverado GMC Sierra 1500 2500, Chevrolet Tahoe/Avalanche Suburban 1500, GMC Yukon/Cadillac Escalade 4.3L 4.8L 5.3L (EPA Compliant)

Catalytic Converter Compatible with 1999-2007 Chevy Silverado GMC Sierra 1500 2500, Chevrolet Tahoe/Avalanche Suburban 1500, GMC Yukon/Cadillac Escalade 4.3L 4.8L 5.3L (EPA Compliant)
  • AUTOSAVER88 direct-fit high flow catalytic converter is designed to meet or even exceed OE quality and performance standards without sacrificing flow rate.
  • Features heavy-duty stainless steel outer shell construction for maximum durability. The internal substrates and precious metal loading have been carefully engineered for maximum efficiency and to avoid MIL (Malfunction Indicator Lamp) code issues that are common with lower quality converters.
  • The standard OE specification flanges are designed for easy installation, direct bolts to existing exhaust system without doing extra modification.
  • Genuine federal EPA certification and OBDII compliant, every catalytic converter is stamped with an exclusive EPA number on the shell. Federal EPA certificated catalytic converters are backed 5 years or 50,000 miles limited warranty.
  • Vehicle Fitment: Compatible with 1999-2007 Chevy Silverado 1500 2500 / Tahoe / Avalanche 1500 / Suburban 1500, GMC Sierra 1500 2500 / Yukon, Cadillac Escalade, please check product description page below for more references.
BESTSELLER NO. 8 in 2021

AUTOSAVER88 ATCC0006 2.5" Inlet/Outlet Universal Catalytic Converter (EPA Compliant)

AUTOSAVER88 ATCC0006 2.5
  • AUTOSAVER88 brand new universal fit catalytic converter is designed to meet or even exceed OE quality and performance standards without sacrificing flow rate.
  • Features heavy-duty stainless steel construction, internal ceramic substrates and catalyst coating have been carefully engineered for maximum efficiency.
  • Standard 2.5" inside diameter inlet/outlet, 11" overall length, universal for vehicles with 2.5 inches outer diameter exhaust pipe.
  • Genuine EPA certification, every catalytic converter body is stamped with exclusive EPA number. Federal EPA standard catalytic converters are backed 5 years or 50,000 miles limited warranty.
  • Non CARB compliant ( illegal for use in California ), OBD II compliant ( for 1996 and newer vehicles ); Installing may require cutting and welding, please consider professional operation.
BESTSELLER NO. 9 in 2021

Kooks Custom Headers GE-307540 High Flow Catalytic Converter

Kooks Custom Headers GE-307540 High Flow Catalytic Converter
  • 3" x 7.5"
BESTSELLER NO. 10 in 2021

Catalytic Converter Compatible with 1998-2002 Honda Accord 2.3L Direct-Fit Stainless Steel High Flow Series (EPA Compliant)

Catalytic Converter Compatible with 1998-2002 Honda Accord 2.3L Direct-Fit Stainless Steel High Flow Series (EPA Compliant)
  • AUTOSAVER88 direct-fit high flow catalytic converter is designed to meet or even exceed OE quality and performance standards without sacrificing flow rate.
  • Features heavy-duty stainless steel outer shell construction for maximum durability. The internal substrates and precious metal loading have been carefully engineered for maximum efficiency and to avoid MIL (Malfunction Indicator Lamp) code issues that are common with lower quality converters.
  • The standard OE specification flanges are designed for easy installation, direct bolts to existing exhaust system without doing extra modification (comes with gasket and hardware).
  • Genuine federal EPA certification and OBDII compliant, every catalytic converter is stamped with an exclusive EPA number on the shell. Federal EPA certificated catalytic converters are backed 5 years or 50,000 miles limited warranty.
  • Vehicle Fitment: Compatible with 1998 1999 2000 2001 2002 Honda Accord 2.3L, please check product description page below for more references.

9 More Questions Answered

Are 200 cell cats legal?

Absolutely, not all 200 cell cats are legal, but 200 cell is the highest flowing cat that is. No one will know you have 100 cell cats until you need to get an emissions test. If you do, it will fail and you will have to fit cats that comply so you can pass.

Will high flow cats make my exhaust louder?

Yes, high flow cats are less restrictive than stock and will allow more sound to pass through your exhaust system.

Will a high flow cat increase mpg?

In addition to free flowing mufflers, high flow catalytic converters can be used to increase exhaust flow and gain better gas mileage. Gains of 1-2 MPG have been documented when switching to high flow exhaust systems. Replace your stock muffler with a high flowing performance exhaust.

What are the benefits of high flow cats?

The high flows are much less restrictive,they allow the engine to "breathe" better and give you the deeper sound or tone,especially w/the 40 series FM's you have.

What is better 100 cell or 200 cell cat?

The 100 Cell will have up to 95% Airflow, is not OBD II compliant and no warranty for OBD II. They have 3 winding centers, therefore they are more durable than the 200 Cell cats. They will give a CEL after 10K miles. They are for racing/track use, but can be used on the street.

Does cat delete increase HP?

If you remove the cat from a miata in good running condition you may see 1/2 - 1 HP thats it. If you have a turbo or SC then you will see better gains, but 50Hp Hello.

Will a new catalytic converter improve performance?

And by doing so, they increase gas mileage and performance. Catalytic converters are designed to last the entire lifetime of your car, however, unattended repair issues in other components of the exhaust system can cause wear and breakdown.

Will no cats throw a code?

zero. it shouldn't throw any codes as long as you keep the O2 sensors hooked up. if you delete the cat entirely and do not hook up the O2 sensors, you will throw codes and run rich. you can delete the cat and weld in a test pipe for the O2 sensor.

Are high flow cats illegal in California?

To be legal in California, a replacement part such as a new catalytic converter must come with a CARB (Calif. Air Resources Board) "sticker" or must be a direct OEM replacement part. There are no "high flow cats" that have a CARB sticker issued for them.