Magnaflow Cat-back Exhaust Install 5th Gen 4Runner
Magnaflow Cat-back Exhaust Install 5th Gen 4Runner
Instructions and Step by Step Install Guide for the 5th Gen 4Runner MagnaFlow Exhaust System.
MagnaFlow 15145 MF Series Performance Cat-Back Exhaust System
Step by Step Installation and Instructions of the MagnaFlow 15145 Cat-Back Exhaust System. This install is on a 2014 Trail 4Runner; however, this MagnaFlow exhaust (15145) will fit on other Toyota 4Runner models (2012-2014). This is a very simple aftermarket 4runner exhaust system install and can take under 3 hours given you have two guys to uninstall the OEM exhaust and install the new MagnaFlow 15145 Cat-Back Exhaust System.
- Check out Today’s Price on Amazon: MagnaFlow Exhaust
You will get the most out of this exhaust system if you couple it with an aftermarket 4Runner CAI (Cold Air Intake) system; however, this is not needed. The CAI combined with an aftermarket exhaust will completely open up the airflow through your engine, thus increasing the overall performance of your 4Runner. Also, having an aftermarket CAI will increase the life of your aftermarket 4Runner filters. For more information on aftermarket 5th Gen 4Runner parts and accessories, browse through our site and please let us know if you have any questions.
MagnaFlow 15145 MF Cat-Back Exhaust Specs
- SYSTEM TYPE: CAT-BACK
- SERIES: MF
- EXIT: STYLED
- OUTLET QTY: SINGLE
- TUBING: DIA2.5 IN
- TIP FINISH: POLISHED
- MATERIAL: STAINLESS STEEL
Uninstall and Installation Time
- 2.5 – 3 Hours
Tools Needed for the Install
- 14mm Sockets – Uninstall
- 15mm Sockets – Install
- Flathead Screwdriver
- WD40 (Optional)
- Penetrating Lube
- Truck Creeper (Optional)
- Jack Stands (Optional)
- OEM Spare Tire Tools
- MagnaFlow_Instruction_Manual_5th_Gen_4Runner (PDF)
- MagnaFlow_Instruction_Manual_Warning (PDF)
Step 1: MagnaFlow Cat-Back Exhaust Install – Jack up Truck
It would be nice to have a lift but you do not need one to install the MagnaFlow Cat-Back Exhaust. If you jack up your 4Runner a couple of feet, you should have plenty of room to move around underneath. Always remember to be safe while you are operating and working underneath your 4Runner. You will want some car creepers or something to move around on once you are underneath the truck. This makes for an easy process for getting in and out from underneath your 4Runner.
Step 2 – MagnaFlow Cat-Back Exhaust Install – Unbolt Exhaust from Y-pipe
Start by unbolting the OEM 4Runner exhaust from the Y-pipe under the center of the truck. This is the piece that connects the actual muffler to the Y-pipe. At this point, you do not want to actually remove the exhaust or even the bolts. Leave the bolts connected. Right now we are just loosening the connection from the exhaust to the Y-Pipe. We don’t want to remove the bolts because we will need to remove two more bolts that are connected to the exit tubing.
In V6 and V8 engines where there is more than one exhaust bank, ‘Y-pipes’ and ‘X-pipes’ work on the same principle of using the low pressure component of an exhaust pulse to increase the velocity of the next exhaust pulse
Step 3 – MagnaFlow Cat-Back Exhaust Install – Unbolt Exhaust from Exit Tubing
We will need to remove two more bolts that are connected to the exit tubing. At this point, you want to loosen these bolts as well. It is important to keep the bolts on that are connected to the Y-Pipe as the whole system moves when you are trying to unbolt the exhaust from the exit pipe.
You remove the bolts from the Y-Pipe (like we did), you are going to have a hard time getting leverage on unbolting the exhaust from the exit pipe. We had to put the bolts back on to get enough leverage to remove the second set of bolts pictured below.
After you have loosened the 4 bolts from the Y-Pipe and the exit pipe, you can now remove all 4 bolts and set the aside.
Save the bolts from the Y-Pipe section, you will need these to install the new MagnaFlow Cat-Back Exhaust on your 4Runner.
Step 4 – MagnaFlow Cat-Back Exhaust Install – Use WD40 to loosen up the Rubber Connectors (Rubber Isolators)
Next, you want to remove all 5 of the rubber connectors (rubber isolators) that hold your exhaust on and prevent your whole truck from shaking when your engine is running. Pictured below are all 5 rubber connection points.
VERY IMPORTANT: Do not damage the rubber connectors, you will need these to install the new MagnaFlow Cat-Back Exhaust on your 4Runner.
To loosen the rubber connectors, use WD40 and a very small flathead screwdriver. Use the flathead screwdriver to open up the rubber connectors in between the rubber and metal. Spray the WD40 in between these small spaces and slide the rubber connectors back and forth until everything is sliding around nice and free.
VERY IMPORTANT: Do not remove any rubber connectors at this point. These are the only thing that is holding your 4Runner OEM exhaust on.
Rubber Connector 1
Rubber Connector 2
Rubber Connector 3
Rubber Connector 4
Rubber Connector 5
Step 5 – MagnaFlow Cat-Back Exhaust Install – Remove OEM 4Runner Exhaust
After you have greased up the rubber connectors with WD40, you can now remove all rubber connectors and remove the OEM 4Runner exhaust.
Step 6 – MagnaFlow Cat-Back Exhaust Install – Remove OEM 4Runner Exhaust Pipe
After you have removed the OEM 4Runner exhaust, you can now remove the actual exhaust pipe from the back of the 4Runner.
VERY IMPORTANT: Note that you will have to lower the replacement tire in the rear of the 4Runner to allow the old OEM exhaust pipe to exit and be removed. If you do not lower the tire, you will not be able to remove the exhaust pipe (yes, this happened to us as well). Hopefully, this helps you expedite the process a little faster.
Step 7 – MagnaFlow Cat-Back Exhaust Install – Ready for Install
Note that the old OEM exhaust is two pieces and the new MagaFlow exhaust is 4 pieces. The new MagnaFlow Cat-Back Exhaust comes with the exhaust, tailpipe, two sections of tubing and three clamps to clamp down the tubing sections.
Step 8 – MagnaFlow Cat-Back Exhaust Install on your Toyota 4Runner (5th Gen)
The first section of the new exhaust you want to install is this crooked looking piece of exhaust tubing. This will go straight up and over the frame of your 4Runner. Just let it sit there where you grab the new MagnaFlow exhaust system.
Step 9 – MagnaFlow Cat-Back Exhaust 4Runner Install – Installing New Exhaust
Grab the new MagnaFlow Exhaust and start connecting the exhaust back onto the truck with the rubber connectors that you left in pristine condition. Once you have the exhaust back onto the rubber connectors, you can grab the two bolts that you disconnected from the Y-Pipe and bolt those back onto the new system.
Step 10 – MagnaFlow Cat-Back Exhaust 4Runner Install – Installing New Tail Pipe (New Clamps)
Once you have the new MagnaFlow 4Runner exhaust bolted onto the Y-pipe and connected to all the rubber connectors, you can now start to clamp on the remaining two clamps in the rear and exit of the exhaust system.
That’s it! This is a very easy install if you have a couple spare hours in your day. It took us around 3 hours from opening the doors to having the new exhaust on the 4Runner. It was an awesome and easy little mod job for your 4Runner or Tacoma. Up next is the TRD CAI (Cold Air Intake). We will see what happens…
You want to check out the exhaust in a couple days and make sure all of the rubber connectors are still in place. It would be a bummer if one of those fell off, you would have a bad time.
Please comment below and let us know if you have any questions!! Thanks, good luck!