Upgrading your ride? Looking for more power under the hood without sacrificing clean air? Then you need to learn about Flowmaster high flow catalytic converters. As any gearhead knows, the catalytic converter restricts exhaust flow, robbing engine power. A high flow cat like those made by Flowmaster can help unleash more horsepower while still keeping your vehicle emissions compliant.
As an auto enthusiast myself, I’m always researching ways to enhance performance without breaking the bank. And let me tell you, Flowmaster high flow cats have really impressed me. In this post, I’ll give you the lowdown on what makes these converters so great, whether they’re the right choice for your whip, expected costs, installation tips, and more. Even if you’re not quite ready to swap out your stock cat, read on to get the inside scoop on these power-pumping parts!
High Flow Cat 101: What Makes Them Different?
First things first – what sets Flowmaster high flow catalytic converters apart from stock? Simply put, they allow exhaust gases to pass through much more freely thanks to larger pipes and less restrictive honeycomb structure inside. This reduction in backpressure enables your engine to breathe better and realize more complete combustion. More air in and out equals more power!
While allowing greater flow, Flowmaster cats still use quality metals and catalyst materials to provide sufficient emissions control. This means you get improved performance without sacrificing clean air or breaking any laws. It’s a win-win situation!
Most stock catalytic converters use a 2.25″ pipe diameter at best. But Flowmaster high flow cats boast a minimum 3″ diameter, with some models going up to 3.5″ or more. They also feature a higher cell density in the honeycomb structure inside to improve flow while maintaining large surface area for emissions conversion.
Simply put, you’ll gain more horsepower and torque across the entire powerband – helping acceleration, passing power, and towing capability. Your ride will sound meaner too thanks to less muffling of your engine’s natural tone.
Pumping Up Performance for Popular Vehicles
Flowmaster high flow cats are available for a wide variety of vehicles, from everyday commuters to American muscle cars and trucks. Basically, if it has an engine, Flowmaster probably makes a high flow cat for it!
Some of their most popular kits are for classic and modern Mustangs, Camaros, Chargers, Challengers, Corvettes, and trucks from brands like Ford, Chevy, Dodge, GMC, and Jeep. Many kits are 50-state legal so you can enjoy the added performance no matter where you reside.
Trucks, SUVs, and tow rigs really benefit from the improved torque and horsepower on tap with a Flowmaster high flow cat. Accelerating onto the highway while towing several tons can be downright lethargic with a stock restrictive converter. An upgraded cat from Flowmaster helps these workhorse vehicles breathe easier and tow with authority.
For late model Muscle cars like the Dodge Charger, Chrysler 300, and Chevy Camaro, a cat upgrade can liven up performance even on vehicles equipped with modern high-output engines. Owners report excellent gains in acceleration, throttle response, and power output when paired with complementary intake and exhaust upgrades.
So whether you drive an older hot rod, heavy-duty pickup, or modern performance car, Flowmaster high flow cats can unlock substantial power gains. Make sure to verify fitment for your specific vehicle before purchase.
Easy Bolt-On Installation
Swapping out your stock cat for a Flowmaster high flow unit couldn’t be easier. In most cases it’s a direct OEM replacement requiring no vehicle modifications. Just unbolt the factory cat, bolt up the new high flow converter, reconnect exhaust and O2 sensor wiring, and you’re set!
The entire job can usually be accomplished in under an hour with basic hand tools. No cutting or welding is necessary. The converters feature premium mounting hardware for hassle-free installation. Detailed instructions are included to walk you through each step.
Trucks with very large stock converters may require an adapter pipe or extension kit. Flowmaster makes it easy to complete the job yourself in a driveway or garage. No need for a shop visit!
Of course you must first check regulations in your state. Many allow high flow converters as long as they control emissions sufficiently. I’ll go into more detail on that shortly.
Staying Legal with High Flow Cats
This is an important question for gearheads living in strict emissions testing regions. The good news is, Flowmaster high flow catalytic converters are engineered to comply with the toughest standards so you can enjoy the added power.
They are CARB-approved for use in California, which has the most stringent regulations. That means they pass the strict tailpipe sniffer test during annual smog checks. Flowmaster also states these converters meet EPA requirements, keeping you legal in all 50 states.
That said, a small number of local jurisdictions may prohibit cat modifications altogether. I recommend researching your state’s exact vehicle code before purchasing. As long as you avoid tampering with any emissions equipment, installing a CARB-approved high flow cat from Flowmaster will keep you street legal. Bring your vehicle to a reputable smog check station afterward to confirm compliance.
I strongly advise against removing your catalytic converter altogether. Not only is it illegal, but you’ll miss out on the performance benefits these converters provide when engineered properly. With a quality high flow cat, you can keep your vehicle emissions compliant while enjoying the added power. It’s really a win-win mod!
Affordable Horsepower – Cost Breakdown
Here’s the part we all want to know…how much dough will these babies set me back? MSRP pricing from Flowmaster ranges between $250-$600 depending on the specific vehicle application. Considering the large power gains on tap, that’s a downright bargain!
As with most aftermarket parts, you can often find discounts of 10-15% at retailers online. For example, a Silverado converter retailing around $400 may be available for $340-$350. So shop around.
When you factor in easy at-home installation, Flowmaster high flow catalytic converters offer some of most cost-effective horsepower you can buy. Even a professional shop install would only tack on another $100-$200 to the total.
Compare that to costs of $500 or more for a basic cold air intake without the same emissions compliance. For more power from every pump of gas, a cat upgrade is tough to beat!
Where to Buy Flowmaster Converters
So where can you pick up one of these high flow beauties? Flowmaster sells primarily through authorized dealers to ensure you get the right parts for your car or truck. Buying from an unauthorized seller risks getting stuck with a bogus converter that doesn’t fit properly. No good!
All the major online retailers like Summit Racing, Jegs, and American Muscle carry the full line of Flowmaster catalytic converters. Amazon also stocks a wide selection to deliver to your door in 2 days or less with Prime shipping.
Local auto parts stores may carry a limited selection of these converters. But for best inventory, selection, and pricing, I recommend the major online retailers or direct from Flowmaster. Don’t forget to comparison shop for the best deal!
Dramatic Difference from Stock Cats
You might be wondering how exactly Flowmaster high flow cats outperform stock converters. Let me break it down for you:
- Larger diameter tubing reduces exhaust backpressure by allowing more volume to pass through. Stock cats typically use 2.0″ to 2.25″ pipes. Flowmaster converters start at 3.0″ and go up to 4.0″ for maximum flow.
- Higher flow-through cell density means the honeycomb structure inside has more openings for exhaust gases to travel through smoothly. Improved flow but still enough catalyst surface area for effective emissions control.
- Better quality stainless steel construction resists corrosion and heat damage to remain free-flowing for the long haul. Stock catalytic converters often use cheaper metals that degrade over time.
- Precious metal catalyst chemistry optimized for lower light-off temperature allows them to work quickly during startup while remaining efficient when hot. Maximizes emissions conversion across operating conditions.
- Large port openings on both inlet and outlet sides reduce turbulence so exhaust can sail on through. Every little bit counts when chasing higher performance!
So in summary, Flowmaster high flow cats combine optimized design and premium construction to easily outflow restrictive OEM converters. And the result is a healthier engine and more power!
Built to Last: Flowmaster Cat Durability
Of course, a performance upgrade like this needs to go the distance. The last thing you want is shelling out hard-earned money for a new cat that craps out way too soon. Rest assured, Flowmaster stands behind their converters with confidence.
The company offers a generous 5 Year/50,000 Mile warranty on most high flow cats. Some models made from a thicker .065″ stainless steel offer an extended 10 Year/100,000 Mile warranty. Very nice coverage to protect your investment!
Going further, Flowmaster states these converters will remain emissions compliant for at least 100,000 miles. Several customers reported passing emissions tests at 150,000+ miles and counting. Just make sure to keep your engine well maintained and tuned.
The durable metals, meticulous manufacturing, and catalyst chemistry expertise result in converters designed to perform inside and out. And with proper installation, they should last at least as long as an OEM cat and likely much longer. For added peace of mind, grab one of Flowmaster’s extended warranty models.
Maintenance Tips to Prolong Your Converter
To keep your shiny new Flowmaster high flow cat running cleanly for the long haul, here are my top tips:
- Use manufacturer recommended engine oils – Higher quality oils keep engine internals and cylinders clean, which prevents fouling of the cat.
- Address drivability issues pronto – Problems like misfires, fuel trim issues, and oil burning quickly contaminate cats. Diagnose and repair promptly.
- Give it a scent check – If you smell sulfur/rotten eggs often, the cat could be breaking down. Have it inspected and replaced if necessary.
- Avoid leaded fuel – Lead poisons the catalyst materials leading to premature failure. Stick with unleaded only.
- Watch the coolant and oil – Coolant or oil burning in the cylinders also leave harmful deposits in the cat. Fix any leaks!
Follow those basics and your Flowmaster converter should keep your ride running strong and emissions compliant for years to come!
How About Fuel Economy?
One concern with performance-enhancing parts is a potential drop in MPG. Fortunately, Flowmaster high flow cats are designed to minimize any economic impact while still delivering more power.
Owners report a negligible 1-2 MPG drop in most cases. Commonly, fuel economy remains unchanged or sees at most a minor decline. Much better than expected considering thenoticeablepower gains.
By reducing backpressure, the engine can operate more efficiently across the rev band. There is less pumping loss with the improved exhaust flow as well. These factors help offset small decreases in aerodynamic and mechanical efficiency.
Your driving style will have the biggest impact on MPG. Because the extra power is so intoxicating, you may find yourself dipping deeper into the throttle. Drive moderately and you should see almost no drop in fuel costs. Either way, the performance bang is worth the buck!
DIY or Professional Installation?
Here’s the million dollar question – can you tackle installing a Flowmaster high flow cat yourself? Honestly, it really depends on your skill level and available tools.
As I outlined earlier, most converters are direct bolt-in replacements requiring only basic hand tools to swap. If you’re comfortable under your vehicle and have some wrenching experience, a DIY job shouldn’t pose much difficulty for most applications. Just follow the instructions closely.
However, more complex installs may demand cutting or welding new exhaust pipes to length. This definitely requires some fabrication skills and equipment. In those cases, having a professional shop complete the work may save you time, aggravation, and potential hazards.
Either way, call around as labor rates vary widely. Expect to budget $100-$300 for install, though some performance shops may charge more. Compare that to the satisfaction of conquering the project yourself!
The Most Popular Flowmaster Converters
From extensive customer research, here are three of the most popular Flowmaster high flow catalytic converters on the market today:
1. Flowmaster 810025 – Direct fit converter for 5.7L Hemi Dodge Charger, 300C, Challenger, and other LX platform cars. Offers a nice bump in horsepower and torque.
2. Flowmaster 953047 – High flow cat for 5.7L Hemi Ram 1500, 2500, and 3500 series trucks. Helps unleash more grunt for towing and hauling.
3. Flowmaster 853002 – Upgrade converter for classic 5.0L Fox Body Mustangs. Uncorks some extra ponies from the iconic 302 V8.
These are just a sample of Flowmaster’s huge catalog of direct fit converters. There’s sure to be just the right high flow cat for your vehicle make and model. Do your homework to pick the optimal kit for your ride and performance goals.
Any Needed Accessories?
A question that often comes up is whether any additional hardware or accessories are required when installing a Flowmaster high flow catalytic converter.
The short answer – most kits include all the mounting hardware and gaskets you need for a hassle-free install. As long as you have the basic hand tools like ratchets, sockets, jack stands, etc., you can swap the new cat in using the supplied components.
Some vehicle-specific instructions do mention possibly needing an O2 sensor extension harness. Flowmaster converters are designed to reuse your factory O2 sensors. But due to a different fitment, the wire harness may need to be lengthened. These extension harnesses are easily sourced online or at auto parts stores if required.
Double check what fasteners, donuts, and gaskets come with your particular converter kit so you can grab any rare extras needed beforehand. Other than that, the included hardware should have you covered!
What Are Customers Saying?
Okay, enough specs and technical details! You probably want to know how actual users feel about these Flowmaster high flow catalytic converters after installing them.
The good news is, customer reviews are overwhelmingly positive. Owners can’t stop raving about the night-and-day improvement in engine sound and power after bolting up a Flowmaster cat.
Many reviewers say they were skeptical the converters could really deliver on the hype. But after experiencing the increased throttle response, torque, and acceleration firsthand, they were believers. Exactly as advertised!
Owners of trucks, muscle cars, hot rods, and more all report excellent gains in seat-of-the-pants feel and dyno tested output. And the quality construction gives them confidence the converters will go the distance.
Really the only complaints mention somewhat tedious installation on a minority of vehicle applications. When sized properly and bolted in with care, fitment issues are rare. For most owners, the Flowmaster cat exceeded their expectations for added performance and sound.
Current Discounts and Promotions
Now for the final piece of the puzzle – scoring a money-saving deal on one of these converters!
The major retailers like Summit Racing and Jegs often run site-wide promotions that apply to Flowmaster products. For example, double rewards points on your entire order or free shipping above a minimum spend threshold.
Around major holidays like July 4th or Black Friday, be on the lookout for tiered discount promo codes too. For orders over a set amount, you can save 10%, 15% or more site-wide, including Flowmaster high flow cats.
Flowmaster also runs occasional rebates directly on their converters and exhaust bundles. Just submit your receipt after purchase to receive cash back via mail or PayPal. Sweet!
Retailers like American Muscle and Maryland Speed specialize in late model domestic performance vehicles. They regularly discount Flowmaster converter kits for modern Challengers, Camaros, Mustangs, and trucks.
With some smart shopping tactics, you can save a chunk off retail price on the Flowmaster high flow cat of your choice. Invest those savings in your next performance mod!
Rev Up Your Ride with a High Flow Cat
Hopefully this detailed breakdown gave you the essential info on Flowmaster high flow catalytic converters. When chosen and installed properly for your specific vehicle, these converters can really wake up performance without breaking the emissions rules.
For more power you can actually feel in the seat of your pants, matched with that glorious uncorked exhaust tone, Flowmaster’s line of direct fit cats are hard to beat. And they do it all while maintaining a clean tailpipe.
So whether you’re rocking a classic muscle car, late model pony, or trusty truck, consider upgrading to a high flow converter. Your ride, and your inner gearhead, will thank you!
