Figured I'd start a thread about this now as I just dropped my 2011 M56 RWD off at PPE Engineering. Planning on full long tube headers, x-pipe exhaust all the way back to replace the stock mufflers.

Hopefully have pictures in two weeks and about a month to 1.5 months till the kit is done.

Very excited about this so I'll be sure to keep everyone posted on the results.

That should be some exciting news for V8 owners.

I have 2 questions that might be of curiosity to others:

• Any idea whether the headers would be emissions-compliant; and if not, would they explore that as an option?
• Approximate cost for a set of exhaust manifolds for subsequent buyers?

I believe your exhaust setup can be replicated for AWD owners if creatively designed. Maybe someone could present an AWD during Y-pipe design.
Either way, the most crucial component in my opinion, should be similar. That is in reference to the exhaust manifolds - unless they snake around so much that the front axles would be in the way. Good luck M56x owners, the right side will be tight.

Emissions compliant, yes and no. I'd have to let PPE Explain that one or maybe even if I have to explain it, maybe it's not a good idea for you to have them lol. I know he will be offering the exhaust with a Cat, but the headers definitely won't have a cat in them.

As far as price, I have no idea. I'd have to let PPE control that communication as well because I don't want to step on toes, nor give anyone the wrong info.

Check out their quality here at their website https://www.ppeengineering-onlinestore.com/

Headers aren't an issue anywhere except CA (as long as the car has functioning cats).

Ken, if they weren't clear across the Valley, I'd love to see the process and outcome. Keep us posted?

Im planning on it, both with pics and dyno comparisons.

AZhitman wrote: ↑

Mon May 04, 2020 9:18 pm

Headers aren't an issue anywhere except CA (as long as the car has functioning cats).

Ken, if they weren't clear across the Valley, I'd love to see the process and outcome. Keep us posted?

Progress is being made

Stock


Drivers Side


Passenger side - Anyone have some good pics of an AWD? They look like they could fit!


Parallel Merge Collector = Bauce!

Thanks for the update! Progress looks awesome

More progress, Exhaust is only Tacked in place. Needs to be taken off for full finish welding and Ceramic Coat the headers

Looks great sir!

Updates? When does the group buy start?

Been looking on PPE site and no updates on there yet. I'm sure if someone wants it now they could call PPE. I'm just waiting to see pricing and options available.

30hp gain untuned

I am not coordinating a group buy as I doubt there will be enough interest, but if you want to reach out to PPE then go for it. Not steppin on my toes if you want to. Plus I don't have time to manage something like that.

Go to PPE's Instagram to check out more pics of the kit - solid kit and I'll be going back for potential resonator delete and or bypass valves for dual mode exhaust.

Oh and sorry, been crazy busy with work lately so I haven't been able to post much.

Trying to get my YouTube channel up off the ground.

Check out my channel Hogg Modified www.youtube.com/channel/UCNujFH2ju3lBOtOCKr8xrqg

Hello Guys,

As of Wednesday 8/19/2020, the information I got directly from Paul of PPE


We are going to release them shortly. We have gotten backed up with work lately and trying to get a little caught up before we start taking orders for them.

They are going to be the same price as our Lexus V8 headers at about $1,802.46. Optional ceramic coating for $300.00

Best Regards,

Paul Prentis

PPE Engineering LLC
75 W Baseline Rd
Suite C58
Gilbert, AZ 85233
480-615-7900
[email protected]

Group buy or just buy from their website?

Just from there website, not sure about the group buy...

More than likely just from the site. At the price point and demand not many will be on the group buy. Group buy will probably need X amount like 10 or 15 etc to make it slightly cheaper.

Group by for a $300 strut bar barely happened before the company backed out and refunded everyone. No way a $2k group buy happens. Not a chance.

ken in az wrote: ↑

Fri Aug 21, 2020 1:57 pm

30hp gain untuned

I am not coordinating a group buy as I doubt there will be enough interest, but if you want to reach out to PPE then go for it. Not steppin on my toes if you want to. Plus I don't have time to manage something like that.

Go to PPE's Instagram to check out more pics of the kit - solid kit and I'll be going back for potential resonator delete and or bypass valves for dual mode exhaust.

Not taking anything away from PPE as I am glad someone is stepping up to build headers for the M56 but I gained more than 30 hp gutting the factory manifold cats, ditching the secondary cats and building a custom 2.5" dual exhaust. Those factory tri-y manifolds make alot of low-midrange torque as well.

Any dyno's on these 30hp gains? How was the 30hp gain determined?

R

It would be nice to see before and after dyno numbers and pictures of your set up... we all here have a common goal/and to share the knowledge we have learned, "How can we make the M56" better.

So when you drop information Like that "Mr.DFW2011M56S", please share details...

Thanks.

Dyno'd before and after.

I get tuned at the end of September, it's too hot in AZ to do anything meaningful in terms of performance during the summer.

Next week I'll be in the "studio" to record the install of my Scale coilovers and stainless steel brake lines. So I'll do a video review of the exhaust as well.

TeamQX56 wrote: ↑

Fri Aug 28, 2020 5:05 am

It would be nice to see before and after dyno numbers and pictures of your set up... we all here have a common goal/and to share the knowledge we have learned, "How can we make the M56" better.

So when you drop information Like that "Mr.DFW2011M56S", please share details...

Thanks.

Agreed.

Pics of the Dyno chart would be great.

DFW2011M56S wrote: ↑

Mon Aug 24, 2020 3:59 am

Not taking anything away from PPE as I am glad someone is stepping up to build headers for the M56 but I gained more than 30 hp gutting the factory manifold cats, ditching the secondary cats and building a custom 2.5" dual exhaust. Those factory tri-y manifolds make alot of low-midrange torque as well.

Unfortunately gutting cats is not an option in states that require emissions inspections. Even so, I would rather have a properly designed header over a gutted cat any day of the week. Yeah it's a cheap, quick and easy DIY fix without having to remove your manifold and you do increase flow, but with gutted cats you create inconsistent pressure and velocity changes in your exhaust flow going into a much larger empty shell from your primaries which affects not only performance but the sound quality as well. Personally I feel like deleting everything from the OEM exhaust manifolds back and replacing it with a custom 2.5" X-pipe and performance mufflers is plenty good enough for our motors even with a custom tune.

The exhaust pics that Ken posted above look awesome. Looks like stainless steel and mandrel bent too. I am wondering if hi flow cats are installed right before the flex connectors and resonators after the X-pipe. I would definitely be interested in this set up if my manifolds end up needing to be replaced.

I am a person with a strong passion for engineering. I want to pursue a degree in Engerology and take a position working with engineering departments. My dream is to one day work at *REDACTED*. It's hard to explain the passion that drives someone to take on a challenging career path, such as becoming an engineer, but I've always wanted to put my abilities into this field. Moreover, since I found this company, I work hard to get into their team.

Does PPE sell cat back system? I watched the YouTube video, amazing sound. I live in CA so smog would be an issue.

Saaax650 wrote: ↑

Thu Sep 09, 2021 3:25 pm

Does PPE sell cat back system? I watched the YouTube video, amazing sound. I live in CA so smog would be an issue.

Yes they do but you need to call and ask them or email.

I need all new cats/manifolds. I’m tempted to go this direction. But if I get aftermarket cats with this setup, will this fix my P0420 issue I’m having?

If you know for sure its a cat issue (usually common with that po420 code) then yes.
Just know, it's not cheap and installing ain't the easiest thing out there. A member in a FB group had slight issues with his install at a shop.

If I get the full headers/exhaust from PPE with high flow cats will that fix my P0420 code? Thanks!