I use the longest glasspack that fits, or I have lying around. On my current BP 4WD, I think it's around 24" inlet-to-inlet, with an 18" body.
The turbo itself takes most of the rasp out of it, as the rasp itself is just the pulses hitting a resonance. those get mixed as they twirl around that snail shell.
make sure it's got straight holes, and not louvers/louvres in it.
The turbo itself takes most of the rasp out of it, as the rasp itself is just the pulses hitting a resonance. those get mixed as they twirl around that snail shell.
make sure it's got straight holes, and not louvers/louvres in it.
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