Can I request Map Support before my exhaust arrive to my door? Yes. Since map support may take up to 3 business days, we encourage you to request maps as soon as your exhaust system has shipped. Share : Related Knowledge Base Posts -What is the definition of a Previously Approved customer to obtain Map Support?When you order an exhaust and pcv (power commander) does the pcv come already mapped for plug an play?Does Brock’s Performance provide Dry Nitrous Map Support?