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Originally Posted by Cloudsurfer
Attached are pics of the RSS underdrive pulley with harmonic damper, designed for M97 3.8 engines. As shown, once the boss on the case has been given a haircut (like all underdrive pulleys require on these), it fits just fine once you use the longer 997 bolt.
I'm inclined to think the addition of harmonic damping is a good thing for all of these motors.
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Does anyone know the diameter & weight differences between the RSS unit with the harmonic damper, versus the 4" Raby/Amond unit?
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http://farm4.static.flickr.com/3420/...90927559_o.jpg
Some stuff for sale: M030 S 24mm front sway bar, M030 base 19.6mm rear sway bar, 996 GT3 OEM Porsche Motorsport front strut mounts monoball "camber plates"
WTB: looking for some 5-7mm spacers with extended bolts