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Polar Wind and BOP Intake
Pontiac V8 Polar Wind and BOP Intake
The Top of the Range — Polar Wind and BOP Intake for Pontiac V8s
The Polar Wind is the top of Butler's Pontiac manifold range and the one with a hard entry requirement. It is an updated alternative to the old BOP intake and a step up from the Victor and the Northwind, built for 850 horsepower and above working in a 5000 to 8000 rpm band.
It uses a 4500 series carb flange and expects real cylinder head flow behind it. Butler stocks it as cast for Edelbrock Wide Port and KRE high-port heads, and CNC port matched to Butler Wide Port or Victor Pro Port castings.
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1. Read the Entry Requirement First
This is not a manifold you step up to for a little more power. It is the last piece of a combination that already exists. The published minimum head port size is an Edelbrock Wide Port or a KRE 380-plus cfm high port, and the recommended minimum head flow is 370 to 380 cfm. Under that, the manifold is not the restriction and you will not see it.
| Power and rpm | designed for applications making 850 horsepower and up, working in the 5000 to 8000 rpm range. That is a converter, a gear and a valvetrain decision as much as a manifold decision. |
| Carb flange | 4500 series only. It takes a Dominator, which means the fuel system, linkage and hood clearance all have to suit one. |
| Where it sits | an upgrade from the Victor and the Northwind on higher flow, higher horsepower combinations, and an updated replacement for the older BOP intake. |
2. Port Matching and the Gasket You Will Need
Butler machines this manifold in house on a 5-axis Haas UMC, modeling the actual head port in 3D so all eight openings are cut and blended the same way rather than ground by hand.
| Butler Wide Port, Victor Pro Port and Kauffman heads | the wide-port opening is relocated and enlarged, so it requires this wide-port manifold and the matching wide-port intake gasket from the SPM-5420PS family. A standard Pontiac intake gasket will not seal it. |
| Victor Pro Port | machined and port matched to the Victor Pro Port opening, which also suits Butler Wide Port and Kauffman heads with the correct wide-port gasket. |
If your heads are not in that group, the Northwind is the manifold to be looking at, and it will make more power on a combination that does not meet these flow numbers. If they are, call Butler in Lawrenceburg with the head, the cam and the target rpm before you order, so the plenum work and the gasket go in the same box.
Not sure what your Pontiac needs?
Call our tech team at 866-762-7527. Tell us your engine, heads, car, and power goal, and we will put the parts together as one combination that works.