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///M3 Forum
The BMW E46 ///M3 is the M version E46 and puts out an amazing 333 HP and 262 lb-ft of torque at stock specs! There are an amazing amount of modifications for both the coupe and convertible models so read up and get started modifying your cars today!

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Old 01-18-2008, 05:22 AM   #1
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Join Date: Mar 2007
Location: So Cal
Posts: 272
My Ride: 01 LSB M3
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!! E46 M3 EBAY Header DYNO Tested !!

Installed headers on Dec 28th, I drove the car over 200 miles and finally scheduled an appointment to get my car dyno'd at SP Engineering.

Installation was a breeze, Header lined up w/ ease. Longer studs were not needed since I purchased new OEM gaskets took about 3hours to do everything including welding the o2 simulator in and extending the o2 sensor harness.

I do not have software. Only mods are BMC filter, Streamline arm, Ebay header... EVERYTHING else is stock.

Went into dyno and the results are as follows...

My Car | 78,000 Miles | Black Ceramic coated header ordered from Ebay
Bone Stock: Max POWER= 258.8 | Max TORQUE= 229.7
BMC + Streamline arm + Ebay header: Max POWER= 279.6 | Max TORQUE= 235.4

Edzilla's car | 45,000 Miles | JVT header ordered from SP Engineering
Gruppe M intake, Gruppe M Muffler, Ebay header: Max POWER= 291.2 | Max TORQUE= 242.3

Video of Edzilla's dyno run -

Maximum gain of 24.5hp and 18.5trq at the wheels from 6500rpm-8000 rpms give or take 2-3hp.

Average gain of 20hp and 13trq at the wheels all the way through the powerband.

I could not compare my previous run from the last time I dynoed b/c I have removed my Eisen Sec2 and Eisen Race Muffler. So for most consistant comparison I overlayed it w/ my bone stock run.

So for about $250 you can have an extra 20-25 horses to the wheels. :thumbsup2::thumbsup2::shiftdriv


Platte Forme A.G.
ESS Tuning | Akrapovic | JRZ Suspension
Brembo | Volk Racing | Voltex

Last edited by Tonester; 01-18-2008 at 05:40 AM.
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