Opinions on a 3.5" versus a 4" aluminum driveshaft. From what I have read the 3.5" is better for a lowered car and the 4" has a higher hp and rpm rating. I'm stock ride height on a 2011 with SVTPP.
3.5" or 4" Aluminum Driveshaft?
- Thread starter KRS
- Start date
Go with 4" driveshaft. The 3.5" was designed for lowered cars beyond 2" to clear driveline. Many people who lower cars with springs 1"-1.5" still run a 4" driveshaft with zero issues. As you mentioned, the 4" driveshaft also has higher rpm capabilities before failure than its counterpart.
Thanks I was leaning towards the 4" and you convinced me. I ordered the 4" Spicer/Dana driveshaft.
is there a weight or price difference? just curious
Not sure on the weight, but the 4" must be a couple of pounds heavier. The Spicer/Dana information just indicates 19lbs lighter than stock. Price difference is $20 more for the 4".
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