Category Archives: How-To Guides

Doc Race Intake Manifold Installation & Dyno Results!

If you’re a diehard N54 enthusiast, you know that there are very few aftermarket intake manifolds available for us. You might also know that Doc Race has been working to produce an intake manifold since 2016.

Once mass-production was confirmed, I had to get one to match my Doc Race N54 single turbo kit. One of the reasons I wanted this intake manifold was because it integrates port injectors directly into the manifold. The typical N54 port injection method (which I currently have) involves a spacer between the engine and stock intake manifold that creates an additional surface for potential boost leaks. Not only that, but it looks awesome too!

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Continue reading Doc Race Intake Manifold Installation & Dyno Results!

How To Walnut Blast Your BMW N54 / 335i / 135i

Walnut blasting is one of the most common maintenance tasks for the N54 engine to remove carbon buildup from the intake valves. Some shops or dealerships charge an arm and a leg for this service, but it can be done at home for much less!

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You’ll need the following parts & tools:


For a complete kit, ready to go (minus compressor), you can get the walnut blasting DIY kit shipped to you straight from BavAuto.

Let’s get started. First you will need to remove the intake manifold. Read this step-by-step process to complete this step.

Once the intake manifold is removed, you should watch my DIY video that will walk you through the rest of the steps!

I took some photos along the way if you need something to reference.

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And the finished results…

Before:

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After:

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BMW 135i or 335i Exhaust with MHD Burble Option

With MHD’s latest release of the “burble” exhaust option, I had to try it out. You only need a few things to make this happen.

Simply download the app, plug the flashing cable into the car and connect the OTG cable to the tablet. Then you can flash a map with your desired burble settings.

I have the burble option set to full aggressive. I have catless downpipes and a full catless exhaust with only one muffler. Take a listen… Continue reading BMW 135i or 335i Exhaust with MHD Burble Option

Tapping Intake Manifold for Larger Vacuum Line (N54 – TiAL BOV)

Since I had to remove my intake manifold while walnut blasting my intake valves, I decided it was the perfect time to tap the manifold for a larger vacuum line. TiAL recommends that their blow off valves be connected to 1/4″ vacuum line, not the small factory 1/8″ vacuum line. This is crucial on modified BMW 135i or 335i.

You will need the following parts:

Once you have all of the parts, it’s a pretty straightforward procedure. First, cap off the existing port with a vacuum nipple and a zip tie. I like to leave this nipple untouched in case I were to ever go back to stock, then I can just plug the larger port we’re about to create.

Capped OEM Port

Next you’ll want to find the flat surface next to the old nipple. Then you’ll start drilling a hole with a small drill bit and eventually work your way up to a 1/4″ bit or until the tap can thread into the hole.

Drill New Hole

Now you’ll use the tap tool to thread the plastic to accept the fitting. Run this tap into the hole until you can thread the fitting in.

Tap New Hole

Grab the fitting and wrap some teflon tape around the threads. Then carefully thread it in until it is nice and tight.

Tape and Thread

Lastly, you’ll bust out the epoxy and coat the outside so it won’t leak.

Add Epoxy

Vacuum or blow out any plastic shavings that are left in the intake manifold and reinstall. Now you’ll grab your new 1/4″ vacuum hose and connect  it from the blow off valve to your larger port for ideal operation.

The Bae

How-To: Install APEX Stud Conversion Kit for BMW

I recently purchased a 75mm Wheel Stud Conversion Kit from APEX Race Parts to go with my APEX ARC-8 wheels. I chose the kit with hex head studs and silver lug nuts.

This kit  makes wheel changing much easier and allows you to use spacers without having to buy extended lug bolts.

As the weather has been getting warmer, I decided it was the perfect time to install them with my summer wheels. So, I documented the process to share!

Step #1 – Loosen all 5 lug bolts while the car is on the ground.
Loosening lug boltsStep #2 – Jack up the car, take off lug bolts, remove the wheel.
Removed wheelStep #3 – Apply a drop or two of thread-locker onto the threads at the short end of the stud.
Thread locker on studs Continue reading How-To: Install APEX Stud Conversion Kit for BMW