|The Pineapple Racing 6-port sleeve inserts are designed to install into the stock 6-port sleeves Mazda used in all 84-91 13B non-turbo RX-7s. These are close-tolerance CNC'd aluminum parts that are hand-pressed into the stock sleeves*.
The Pineapple Racing 6-port sleeves flow much better that the stock sleeves, which dead-end severely. The bowl of the insert is radiused for maximum flow, while the lip at the end of the insert is designed to properly locate the bowl within the port aperture.
Price is $49 per pair, plus shipping.
To order, please call Pineapple Racing
& please let them know you saw this item on REI, thank you.
*Note: They recommend a drop or two of Green (#262) or Red (#271) Loctite to bond the insert in the sleeve and that you 'ding' the edge of the sleeve to mechanically secure it, as insurance. For instructions, please click HERE. They will install your inserts for free if you mail them clean 6-port sleeves, but they cannot do a core exchange as they have had problems getting cores returned.