8 Products
Cat-Back Exhaust
What Is a Cat-Back Exhaust?
A cat-back exhaust system is an aftermarket exhaust system that replaces the components of the exhaust system from the catalytic converter to the exhaust tips. The term "cat-back" stands for "catalytic converter back."A cat-back exhaust system typically includes the following components:
| Mid-Pipes | These are the sections of the exhaust system that connect the catalytic converter or resonator to the muffler. |
| Muffler(s) | The cat-back system may include one or multiple mufflers, which help reduce exhaust noise and improve exhaust flow. |
| Tailpipes | These are the sections of the exhaust system that extend from the muffler to the exhaust tips, providing the exit path for the exhaust gases. |
The main purpose of a cat-back exhaust system is to improve the performance and sound characteristics of a vehicle. A cat-back system can offer benefits such as:
| Increased Exhaust Flow | Aftermarket cat-back systems are often designed with larger-diameter pipes and less restrictive mufflers, allowing for better exhaust gas flow. This can potentially lead to improved engine performance by reducing backpressure. |
| Enhanced Sound | Cat-back exhaust systems can provide a more aggressive and sporty exhaust note compared to the stock exhaust. |
| Aesthetic Upgrades | Cat-back systems often come with larger or differently styled exhaust tips, which can enhance the visual appearance of the vehicle's rear end. |
Filter products
- ENGINE
-
POWERSTROKE
- DPF Delete Exhaust
- All In One Kit
- EGR Delete Kit
- CCV PCV Reroute Kit
- DPF Delete Dual Exhaust
- Tuner
- Intercooler Pipe Kit
- Up-Pipe
- Intercooler
- CP4 Bypass Kit
- CCV Recirculating Kit
- Muffler
- Downpipe
- Intake Manifold
- Air Intake Kit
- Radiator
- Oil Catch Can
- Differential Cover
- Coolant Tube
- Valve Cover
- Transmission Pan
- Coolant Expansion Tank
- Exhaust Manifold
- Turbo
-
DURAMAX
- Tuner
- EGR Delete Kit
- CCV Reroute/delete kit
- DPF Delete Exhaust
- DPF Delete Dual Exhaust
- All In One Kit
- Muffler
- Up-Pipe
- Downpipe
- Intake Elbow Bridge Kit
- Intercooler
- Intercooler Pipe Kit
- Air Intake Kit
- Radiator
- Differential Cover
- Valve Cover
- Oil Pan
- Cooler Line Kit
- Fuel Sump Return Kit
- Tonneau Cover
- Coolant Tube
-
DODGE RAM
- Tuner
- EGR Delete Kit
- CCV Reroute/delete kit
- EGT Relocation Kit
- DPF Delete Exhaust
- All In One Kit
- Muffler
- Air Intake Kit
- Intercooler
- Intercooler Pipe Kit
- Radiator
- Valve Cover
- Differential Cover
- Intake Manifold
- Coolant Bypass Kit
- Coolant Leak Repair Kit
- Fuel Rail Plug
- Fuel Tank Sump Kit
- Oil Catch Can
- Oil Pan
- Coolant Tube
- ALL-IN-ONE KITS
- CATEGORIES
- ON SALE
Let customers speak for us
from 5712 reviews
Loved the kit good fit and finish and easy to install. The little extraction tool helped immensely for that pesky bolt on the back. I purchased this kit because of the good reviews and I seen one on a 2018 Chevy Duramax that had been fully deleted and was asking the owner questions about the kit and where he bought it, he said SPELAB it was well worth the money and made it easier to put oil in the truck and yes does make it a lot easier to fill the engine with oil and if the old plastic ccv system cracks do to heat and and age it pushes oil on the engine and could cause a fire so it was well worth the money and piece of mind. So if you are looking for a CCV reroute kit I highly recommend this kit.
do not treat head studs like ordinary bolts. Clean and chase every block thread, verify hole depth and any fluid passages, then apply the supplied assembly lubricant only where specified—especially on nut and washer contact surfaces.
Took the gamble on these. Ive installed arp studs for customers and I did these in my truck. Few thousand miles now and no issues. I can’t say they are better than arp but I can say they are just as good for just half of the price.
Coolant Reservoir for 2011-2019 Ford 6.7L Powerstroke Coolant Overflow Tank | SPELAB
Good quality coolant tank with fair price!
First off I purchased this intake horn/w grid heater relocation because of the price and the heating element came as a kit. I am not a truck mechanic and this part wasn't very easy for me to swap out. The parts were shipped extremely fast and well packaged this intake horn was installed in conjunction with Spelab's rid heater delete kit. I was also nervous to do this swap myself because I haven't messed with any of these parts previously. But Praise God I was able to take everything apart and install the new parts without any issues. The videos were alright also looked up a few videos on YouTube to get a better idea of what I was up against before I started. Overall Spelab has been a great experience, all the parts were very nice looking and well made. I will definitely do business with Spelab in the future. I am considering doing the head stud kit.
Works great on my 08 f250, thank you spelab!
Billet Aluminum Valve Cover for 2008-2010 Ford F250 F350 F450 F550 6.4L Powerstroke | SPELAB
It’s an exhaust not really much to screw up. Exactly what I thought it would be.
Installed on my 2015 ram. About 10 hours start to finish. Also did a valve adjustment. So far so good, doing a hot retorque in the next few days, but I’m set on max, 200hp, tune and it sounds amazing. If your deleted and tuned you need these.
Muy buena calidad y excelente servicio. Dios me los bendiga
Easy to install looks great 👍🏽
Extremely Happy!!
much cheaper than big brand and seems good quality, thank you Spelab.
Price was great w heavy discounts. Great 5R110 6.0 powerstroke aluminum, Red, deep pan. W bolts and gasket. Great packing and instructions.
This kit came with everything I needed to get the job done. There's a great SPE lab video online for installation help. Every piece felt quality and was simple enough to put together. Had extra hose after running all the way to the back of my rig so there's plenty provided. I just ran mine to atmosphere so there's a popcorn sound at the back of my rig now but it doesn't smell terrible. Definitely recommend this upgrade for anyone who wants a healthy engine. As for how hard the installation is, if you can change the CCV box you can install this kit.
FAQS
Eight products spanning Ford F-150 5.0L (2011–2019), Nissan 350Z/Infiniti G35, Subaru Impreza WRX/STI, Mazda Miata MX-5, Toyota MR2, and Jeep Wrangler JL. No diesel-specific cat-back kits are listed.
A cat-back system replaces everything from the catalytic converter to the tailpipe: mid-pipe, resonator, muffler, and exhaust tip. It retains the catalytic converter and is emissions-legal in most states.
Expect 5–15 HP on naturally aspirated engines. Sound improvement is more noticeable than power gains. Turbocharged vehicles benefit more when paired with a tune and intake upgrade.
No tuning is required for bolt-on cat-back systems. Unlike DPF-back or turbo-back exhausts, cat-back kits do not alter emissions hardware and will not trigger fault codes.
Yes. All SPELAB cat-back kits use factory flange locations and standard clamp connections. No welding is required. DIY installation takes 1–2 hours with basic hand tools.
