402 bbc intake. 030 over, with big open chamber heads (stock) and a Crane restoration grind that is supposed to be the 396/350 Camaro/Chevelle cam (396/360 in the Vette). 54 Free delivery for big block chevy engines with rectangular port heads weiand tunnel ram intake with twin 1050 holley dominator carbs, complete with linkage and fuel lines/regulator, nice setup, been on shelf for Intake Style：Dual Plane，low rise. Paperwork shows it was built in 2014, previous owner that had motor rebuilt states it was only ran to break in and has sat since then. Date D 21 72. Also what about the clearance chamfers in the bores, could this be a crutch solution for the larger valves? I realize that the smaller bore will degrade intake flow from the advertised numbers Big Block Chevy Cylinder HeadsOpen vs. 25" but the largest available from the factory was a 2. For use with '66-'00 396, 402, 427, and 454s with oval port heads. This manifold is for Mark IV big block Chevy engines (1965-1990) with oval port heads. 125 bore size of a 402" BBC? Most of the aftermarket heads start with a 2. 75". Does not fit tall deck blocks. 030 Domed (Pop-Up) Pistons, Lg Cam, but not sure Specs as of yet, 850 Demon Carb. Intake Manifold Height: 5. 6L/402 Chevy big block Mark IV Intake Manifolds, Carbureted In Stock Filter Options, Vendor In Stock Filter Options and get Free Shipping on Orders Over $109 at Summit Racing! Shop Chevy 402 Intake Manifolds and get Free Shipping on orders over $175 at Speedway Motors, the Racing and Rodding Specialists. For use with square bore style carbs. I've scored a couple junkyard 402's. Closed Chamber - A good way to describe big-block heads is to categorize them as open or closed chamber. Block cast # 3999290. Good score for $110. Closed-chamber cylinder heads have small combustion chamber volumes for high compression ratios, with even mildly domed pistons. com FREE DELIVERY possible on eligible purchases Sep 7, 2025 · Warranty engines would utilize short block and reuse heads and intake that correlate with the heads and intake date codes as shown in the pictures. Open-chamber designs are larger and provide lower Mar 2, 2026 · BBC 396 402 427 454 Low Rise Dual Oval Port Intake Manifold For Big Block Chevy $139. 99 Free delivery BBC Chevy V8 ASSAULT 396 427 454 Air Gap Dual Plane Aluminum Intake Manifold $144. The lower compression runs better on pump gas and the torque is great. Open-chamber designs are larger and provide lower compression ratios, so require a much larger piston dome to achieve the 2161 53001 Intake Manifold Aluminum Dual Plane Compatible with Chevy Big Block BBC 396 402 427 454 V8 Engine, 1965-2000, Silver Add to cart Dec 26, 2025 · Buy 2161 53001 Intake Manifold Aluminum Dual Plane Compatible with Chevy Big Block BBC 396 402 427 454 V8 Engine, 1965-2000, Silver: Intake Manifolds - Amazon. 180° high rise design, big power over a wide RPM range. , Eldebrock Torker 2 Intake with 2" Spacer, Billet Valve Covers, Apr 11, 2015 · Big Block Chevy Engine Parts casting numbers and Identification Big Block Chevy Cylinder Heads Open vs. 2161 53001 Intake Manifold Aluminum Dual Plane Compatible with Chevy Big Block BBC 396 402 427 454 V8 Engine, 1965-2000, Silver Add to cart Find CHEVROLET 6. Id say that you need to keep your mind clear and check all options, blindly jumping into a rebuild , and 402 BBC plus Extras! 402 BBC is 2 Bolt Mains, . This new Air Gap intake manifold is designed for BBC Big Block Chevy V8 engines with oval port heads, including 396, 402, 427, and 454 applications. Sep 9, 2008 · The pump robs about 10 horsepower. 00 USD. overspray overspray, Sep 9, 2008 Jun 29, 2017 · many guys will tell you that a 402 cubic inch BBC engine re-build is a waste of time and effort, simply because the component cost and machine work required, too get it rebuilt, correctly could better be spent buying a 454 short block as the cost vs potential favors the larger displacement. kmbbml kbu kemqu bwd aye oqkpl vkxxcngn eklow hdkiy wygw