Category Archives: Modifications

BMW 335is/550i Clutch Upgrade

2017 Update: Clutch setup is holding up great after 20k hard miles!

After adding my aggressive E85 flash last summer, the factory clutch started to slip. I decided it was time to upgrade so I could enjoy the car to it’s full potential this summer. From Spec to ACT, there are plenty of aftermarket options available. Then I found the 335is/550i clutch upgrade on ECSTuning, so I started to do some research.

This clutch comes factory in the F10 550i, which puts down 443 tq and weighs a whopping 4552 lbs. DINAN doesn’t offer a clutch upgrade for their different stages of 550i’s, so apparently they feel that it is adequate. Their Stage 3 550i puts down 580 tq and they kept the factory clutch. Also, someone on the forums is using this clutch and claims that it is holding at over 620wtq on aftermarket turbos. To me, it sounds like the clutch is severely underrated.

My 135i won’t see more than 500 tq anytime soon. I’d guess that it is currently around 420whp/465wtq, but only weighs 3300 lbs!

I decided to give it a try. Here is my parts list from ECSTuning:
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BMW 135i – Angel Eye Upgrade with LUX H8 Halos

After owning my 1-series for over a year, I finally got sick of the halogen angel eye bulbs. I previously coded their voltage intensity up higher to make them brighter, but I still didn’t like the warm color.

So, I decided to buy myself an early Christmas present! LUX was running a sale, so I grabbed a pair of their latest and greatest angel eyes. Their H8 angel eyes advertised a pure white 7000k temperature with extreme brightness. Perfect!

LUX H8 Angel Eyes

I received them a few days after ordering and wanted to install them right away. All I had to do was pop the rear headlight covers off. They can be finicky, but you’ll figure it out. After the cover was off, I twisted the old bulbs out. Next, I inserted the new bulb and tucked the power supply box out of the way. Drum roll please…

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BMW 135i Interior LED Conversion

Why do cars still come with halogen headlights and crappy interior bulbs? It’s 2015, Xenons and LEDs should be standard issue, since the 1 series is pretty old – I decided to take it upon myself to upgrade the interior lights.

I finally ordered some LEDs from ECSTuning. They sell a full LED kit for the 135i, but it’s marked up an additional $15 for no reason. So, I bought everything individually to save some cash. (1) overhead kit, (1) glovebox bulb, and (1) trunk bulb for a total of $41.33 instead of $54.95… you’re welcome. Here are my results:

BMW 135i - front dome light conversion BMW 135i - rear dome light conversion BMW 135i - glove box light conversion BMW 135i - trunk light conversion

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Custom ABS Front Splitter for my BMW 135i

It was just another day browsing 1Addicts when I stumbled upon a thread about custom front splitters by fmxomar. There was a ton of interest, but no one had installed one yet. For the price, I figured I’d pull the trigger on the front splitter and a set of side splitters.

I thought these two items would flow perfectly with the Rieger rear diffuser that I’ve had my eyes on. The parts arrived within a week and came with installation hardware, but no mounting holes. I guess that’s what a drill is for! First step: remove the front bumper.

BMW 135i - front bumper removedI started off by clamping the splitter to the bottom of the bumper and then lined everything up. 9 holes later and it was attached. I still wanted to mount the OEM wheel wind deflectors, so I trimmed 1/2″ notches in the back of the splitter to make room.

BMW 135i - installing splitter

Because both parts are plastic and the splitter wasn’t structurally mounted, I didn’t want to take the chance of it folding under at high speeds. So, I installed two APR support rods. It took a little courage to drill into a perfectly good front bumper, but it was a risk I was willing to take. I followed the center-flow design and made sure to use large washers on the back of the bumper. Everything was secure so I quickly re-mounted the front bumper. It is a very sturdy setup.

BMW 135i - custom front splitter installedOverall, I am very satisfied with this splitter. I would not recommend mounting it without supporting rods, but feel free to do so at your own risk. Stay tuned for the side-skirt installation in about a month!

BMW 135i - custom front splitter installed

BMW 135i - custom front splitter installed