These are not the 440s or the 550s. These are the RC500 and have been cleaned and properly flow tested by RC Engineering. I have not installed them since then. Comes with new o-rings as well.
$200 OBO (paypal & shipping included within US). These were $600+ when purchased new. Thanks for looking.
Test results are below.
$200 OBO (paypal & shipping included within US). These were $600+ when purchased new. Thanks for looking.
Test results are below.
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