CREATE TABLE table_23165 ("RPM" FLOAT, "Standard HP" TEXT, "Standard torque  ( lb/ft ) " TEXT, "Standard speed  ( 6th gear ) " TEXT, "Modified speed  ( 6th gear ) " FLOAT, "Modified HP" TEXT, "Modified torque  ( lb/ft ) " TEXT)

when standard speed (6th gear) is 88, what is the rpm?
SELECT "RPM" FROM table_23165 WHERE "Standard speed (6th gear)" = '88'
SELECT "RPM" FROM "table_23165" WHERE "Standard speed (6th gear)" = '88'