DIY: PRL Motorsports Downpipe + Front Pipe Install

ferdinand

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You shouldn;t be pushing if you taking off the downpipe bolts off the turbo.. you will be tighten the bolts/nuts instead
I didn't think I needed to clarify which bolts, lol - when you are under the car, you can loosen the down pipe/front pipe bolts by pushing or pulling depending on the orientation of your body. You can also "push down" to loosen the turbo bolts..just trying to make it easer for those who will be doing their own install.
 

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Since PRL hasn't released an official installation guide, i'm making this to help out anyone who preordered the Downpipe / Front Pipe.

Total Time: 3 Hours

Tools Needed:
Flat Head Screwdriver
Phillips Head Screwdriver
14mm Socket
12mm Socket
10mm Socket
Breaker Bar
5mm Allen Key
12mm Wrench
14mm Wrench

Put your car on ramps or jack stands and make sure its cooled down before starting.

IMG_6533.jpg


Remove 6x flat head screws that release when you turn them 90 degrees.

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Remove 4x phillips head screws on the front edge of the metal cover.
Then you should be able to remove it by sliding it backwards off the 4 plastic hangars.

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IMG_6540.jpg


Remove:
2x 5mm allen key screws
2x 10mm hex head screws (front left not pictured so thats why the blank circle is there)

IMG_6539.jpg


Remove:
14x Push pin clips (I'm missing one so it isn't pictured)
5x 10mm hex head screws

The panel will pretty much just fall out once you've gotten most of the clips/screws out

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I started in the back and removed the 3x 14mm hex nuts securing the OEM front pipe to the rest of the exhaust


IMG_6551.jpg


Then I removed the 3x 14mm hex nuts at the front of the OEM Front pipe.. turns out the whole threaded stud came out. I needed to use a breaker bar up here.

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I pulled the exhaust bushing off at the circled peg that is connected to the chassis

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I had to take these two 10mm hex head screws out so give the front pipe a little more wiggle room to get out.

IMG_6555.jpg


I also had to push down on this heat shield to give the front pipe the last bit of clearance in order to come out.

IMG_6556.jpg


The OEM front pipe should come all the way out now.
Remove the exhaust bushing and put it on the PRL Front Pipe the same way you took it off.

IMG_6559.jpg


Remove 2x 14mm bolts from the mounting brackets at the bottom of the cat
Also loosen 2x 14mm bolts connecting the bracket to the engine so there is room for the cat to drop through when you remove it.

IMG_6557.jpg



Now to the engine bay:

Remove whatever air intake you have, I have the Injen SRI so all I had to do was disconnect the sensor, remove the nut securing it to the block, and release the hose clamp closest to the turbo.

Remove 2x 10mm nuts holding this bracket to the engine so you have room to get to the cat.


IMG_6560.jpg


Disconnect the two O2 sensor plugs from this bracket and remove the bracket.

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Remove 3x 12mm bolts securing this heat shield to the top of the cat.

IMG_6564.jpg


Forgot to take a picture but there are 2x 14mm bolts and 2x 14mm lock nuts holding the cat to the turbo, I had to use a breaker bar to get them loose and then take your time here and loosen them all evenly.

NOTE: Please acquire new lock nuts or standard nuts (M10x1.25) for when you attach your PRL Downpipe because I now have a permanent lock nut on my downpipe/turbo so good thing I don't plan on putting the cat back in.

After you have the 2 nuts and 2 bolts off make sure you disconnect the secondary O2 sensor plug and then the cat should be able to drop through the bottom as long as you loosened the 2 mounting brackets.

Use a crescent wrench (Idk what size the nut is on the O2 Sensor) and remove the O2 sensor from the cat and install it on the PRL Downpipe before you install.

Make sure you keep the OEM exhaust gasket on the studs on the turbo and then start reinstalling everything in reverse order.
I didn't take any pictures of reinstalling it because I was really excited and there wasn't anything challenging or different about the reinstallation.

The other pictures below show the direction in which I used the provided nuts/bolts, yours might fit through one way better than the other but as long as you get them nice and tight i don't think the direction really matters.

There is no torque specifications available as far as I'm aware so I just tightened them until i couldn't anymore. You'll have to use a backup standard 14mm wrench to tighten the nuts/bolts.
Obviously make sure you put the supplied exhaust gaskets in between the connections of the PRL Front Pipe at the downpipe and exhaust.

Not sure the proper way or time to put the exhaust bushing back on but I did it last and it was a pain in the ass but I still got it on there.

Reinstall the bottom two panels the same way you took them off, you shouldn't have any issues.

Enjoy!

**I've never written one of these before so please let me know what I can do to make the guide better and if I left anything out.**


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Anybody know the torque specs. I think i have an exhaust leak and need to tighten more. But i dont want to over tighten the bolts on downpipe thanks
 

IronFusion

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I'm not sure about the specs but I tightened alternating diagonals incrementally, like for a tire change, and with two fingers at the end of a breaker bar. Has anyone tried running the thinnest of beads of RTV or similar sealants before tightening?
 

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Anybody else having ratting noises?
I have a catless downpipe and front pipe combo and it only rattles when making turns from 0-5mph.
I looked under the bottom to see if it was possible to have a loose bolt rattling around somewhere and nothing. I banged the front flex part of the front pipe a bit and got some rattling. I disconnected the front pipe where it mates to the original exhaust and a metal-like ring fell out so I bolted it up with and without the ring and it still rattled. Any help????
 


Fiiggy_3

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Oh it’s also only left turns. No noises to the right
 

NeoDragons

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Anybody else having ratting noises?
I have a catless downpipe and front pipe combo and it only rattles when making turns from 0-5mph.
I looked under the bottom to see if it was possible to have a loose bolt rattling around somewhere and nothing. I banged the front flex part of the front pipe a bit and got some rattling. I disconnected the front pipe where it mates to the original exhaust and a metal-like ring fell out so I bolted it up with and without the ring and it still rattled. Any help????
would you happen to have pics of how the pipes are bolted up, ie downpipe to front pipe
 

Fiiggy_3

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would you happen to have pics of how the pipes are bolted up, ie downpipe to front pipe
I’ll be taking another look at this on Friday or Saturday. It’s going to be raining the next couple of days. I will snap a few pics
 

MacKharoni

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Anybody else having ratting noises?
I have a catless downpipe and front pipe combo and it only rattles when making turns from 0-5mph.
I looked under the bottom to see if it was possible to have a loose bolt rattling around somewhere and nothing. I banged the front flex part of the front pipe a bit and got some rattling. I disconnected the front pipe where it mates to the original exhaust and a metal-like ring fell out so I bolted it up with and without the ring and it still rattled. Any help????
It did for me. Its the heat shield on the front pipe area. Its rubbing against the top shield. What I did was grab a pry bar and pry it away from the front pipe
 

Fiiggy_3

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It did for me. Its the heat shield on the front pipe area. Its rubbing against the top shield. What I did was grab a pry bar and pry it away from the front pipe
I already tried that and nothing. I also took a look at the top of the pipe and it didn’t show any contact to the pipe. It’s clearing it for sure. I’m gonna try and see the brackets if they’re correct as others were saying fixing the bracket and mounting it behind that pipe is how it’s supposed to go and eliminates the rattling. I’ll give that a check in a few days. As for now it is annoying driving around a brand new car with rattling at low speeds, I feel like a high school kid dumping money into a car that isnT worth it lol. Hope to get this fixed soon!
 


MacKharoni

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I already tried that and nothing. I also took a look at the top of the pipe and it didn’t show any contact to the pipe. It’s clearing it for sure. I’m gonna try and see the brackets if they’re correct as others were saying fixing the bracket and mounting it behind that pipe is how it’s supposed to go and eliminates the rattling. I’ll give that a check in a few days. As for now it is annoying driving around a brand new car with rattling at low speeds, I feel like a high school kid dumping money into a car that isnT worth it lol. Hope to get this fixed soon!
Dude I feels you. Mine get random rattles still when i get off 1st gear.
 

Fiiggy_3

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Dude I feels you. Mine get random rattles still when i get off 1st gear.
I hate it. Hopefully it gets fixed soon, if not I’m taking all of my prl upgrades off
 

Vlad

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Hi guys I have PRL Cated down pipe from pipe combo after 2 weeks these happens what’s should I do

Honda Civic 10th gen DIY: PRL Motorsports Downpipe + Front Pipe Install E70ACD3F-9B01-4CB1-8FB1-3947A49BA5DD
 

dc2turbo

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Hi guys I have PRL Cated down pipe from pipe combo after 2 weeks these happens what’s should I do

E70ACD3F-9B01-4CB1-8FB1-3947A49BA5DD.jpeg
get a tuner and disable the secondary O2 or just keep resetting it when it pops up
 


 


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