INTAKE MANIFOLDS, GASKETS AND COMPONENTS
The wide range of Chevrolet Performance intake manifolds are cast-iron and aluminum for carbureted and fuel injected applications. These intake manifolds were designed specifically for GM engines so you know they will deliver optimum performance. Due to the profile of some Chevrolet Performance high-rise intake manifolds, hood clearance should be carefully checked before ordering an intake manifold.
14097092
Intake Manifold – Oval-Port, iron, spread bore
- Economical iron 4-bbl intake manifold
- Fits all 396–502 engines with large oval-port heads
NOTE: Open carburetor spacer is not recommended with use of dual-plane manifolds.
19131359
High-Rise Intake Manifold – Rectangular-Port, square bore, Holley Carburetors
- Aluminum, dual-plane manifold can be used with high-performance cast-iron or aluminum rectangular port heads
- Same as used on 454 HO and 502 HO engine assemblies
NOTE: Ports do not match Bowtie cylinder heads P/N 14044861 and P/N 12363425.
NOTE: Open carburetor spacer is not recommended with use of dual-plane manifolds.
12363420
High-Rise Intake Manifold – Oval-Port
- Designed for all 396-502 engines with GM aluminum heads (1975 and earlier) and large oval-port iron heads
- Has a dual-plane design with spread bore flange and a dual-bolt pattern
- Has no provisions for a hot-air choke, but will accept a divorced choke or electric choke
- Accepts air conditioning and alternator brackets
- Use intake manifold gasket P/N 12366985 and bolt kit P/N 12367959
NOTE: May not fit on many Corvette models. Manifold height is 6" at the rear and 4.5" in front. Check for hood clearance before ordering.
NOTE: Open carburetor spacer is not recommended with use of dual-plane manifolds.
12363421
High-Rise CNC-Port-Matched Intake Manifold – Oval-Port, spread bore
- Similar manifold design as P/N 12363420 (see above), but it is “CNC” port-matched to Chevrolet Performance oval-port aluminum cylinder heads
NOTE: Open carburetor spacer is not recommended with use of dual-plane manifolds.
12363406
Intake Manifold – Oval-Port, square bore, Holley Carburetors
- Same as manifold P/N 12363420 (see above), but designed for use with a Holley carburetor
- Dual-plane design requires bolt kit P/N 12367959, which includes 16 bolts (8740 chrome-moly 3/8"-16 x 1.5" with 3/8" hex head and 16 5/8" O.D. washers), and manifold gasket kit P/N 12366985
- Accepts air conditioning and alternator brackets and a late-model water neck
NOTE: Will not fit production Corvettes, and may not fit Chevelles. Manifold carb flange height is 4.450."
NOTE: Open carburetor spacer is not recommended with use of dual-plane manifolds.
12363407
CNC-Port-Matched Intake Manifold – Oval-Port, square bore, Holley Carburetors
- Same as P/N 12363406 (see previous page), except it has been CNC-port-matched for GM aluminum oval-port heads with large oval-port heads (1975-and-older), and all aluminum heads with oval-ports
NOTE: Open carburetor spacer is not recommended with use of dual-plane manifolds.
88961161
Intake Manifold – ZZ572/620 Engine, square bore, Holley Carburetors
- Aluminum single-plane intake manifold is used on the ZZ572/620 engine
- The carburetor flange is for a 4150-style carburetor
- Use intake gasket P/N 88962213
- For tall-deck blocks
88962218
Intake Manifold – ZZ572/720R Engine
- Aluminum single-plane intake manifold is used on the ZZ572/720R engine
- The carburetor flange is for a 4500 Dominator-style carburetor
- Use intake gasket P/N 88962213
- For tall-deck blocks
Ram Jet Fuel Injection Kit, with MEFI-4 Electronics
- Retro-fit fuel injection kit is calibrated for a 502/502 Chevrolet Performance engine and is the same as used on the Ram Jet 502 P/N 12499121
- May be used on other Big-Block applications by replacing the ECU unit with an aftermarket unit with the proper calibration
- Includes brackets, sensors, bolts, nuts, gaskets and other small parts, including:
ELECTRONIC CONTROL UNITS & COMPONENTS
88962718
ECU, Ram Jet 502
- Replacement ECU for all Ram Jet 502 engines (MEFI 3 P/N 12497323 or MEFI 4 P/N 12499121)
- MEFI 4 Ram Jet engine is a closed-loop system that gives a much smoother idle and improved performance
NOTE: Replacing the ECU on MEFI 3 Ram Jet engine P/N 12497323 requires using new wire harness kit P/N 12499117, or jumper wire P/N 88963118 to use MEFI 4 ECU as an open-loop system.
12499117
MEFI 4 ECU & Wire Harness Kit, Ram Jet 502
- Module/harness kit is used to convert a Ram Jet 502 from MEFI 3 to the newer MEFI 4 design, which offers improved idle and performance through a closed-loop system
- Includes module P/N 88962718, wire harness P/N 88961968, oxygen sensor P/N 19178918, intake air temp sensor P/N 25036751 and oxygen sensor fitting P/N 15156588
NOTE: The ECU is programmed with a “green mode” that controls the rpm for the break-in period. During this period, engine speed is limited to 4,000 rpm in the first hour, 4,500 rpm in the second hour and 5,500 rpm in the third hour.
88963118
Jumper Harness, MEFI 3 to MEFI 4
- Allows an MEFI 4 module to be used with an MEFI 3 wiring system (to stay as an open-loop system)
- Fits both Big-Block and Small-Block engines
88961968
MEFI 4 ECU Harness, Ram Jet 502
- Used in the MEFI 4 Ram Jet 502 P/N 12499121 with the MEFI 4 closed-loop oxygen sensor-equipped system
- Use with MEFI 4 ECU P/N 88962718
12464482
Lower Manifold, 502 Ram Jet
- Aluminum lower portion of the intake manifold is used on Ram Jet 502 crate engine P/N 12499121
- Use with upper manifold P/N 12464484 (see below), upper manifold gasket P/N 12489372 and bolt package P/N 12497460
12464484
Upper Manifold, 502 Ram Jet
- Aluminum upper portion of the intake manifold is used on Ram Jet 502 crate engine P/N 12499121
- Use with lower manifold P/N 12464482 (see above), upper manifold gasket P/N 12489372 and bolt package P/N 12497460
MANIFOLD GASKETS AND COMPONENTS
12555320
Oil Shield
- Isolates hot engine oil from the air/fuel mixture
12366985
Gasket, Aluminum Oval-Port Heads
- Designed for Big-Block aluminum heads P/N 12363390, P/N 12363392, P/N 12363399, P/N 19331425, P/N 19331424 and P/N 19331422
- Use with manifold P/N 12363406, P/N 12363407, P/N 12363420 or P/N 12363421
88962213
Intake Manifold Gasket
- Use on all Big-Block engines with rectangular intake port heads 396- through 572-cubic-inch
- Includes 2 gaskets
12506106
Gasket, 454 and 502 Engines
- Used on 454 and 502 engines; with restricted heat crossover passages
- 1 gasket per package; order 2 per engine.
12367959
Bolt Kit, Intake Manifold
- For any Big-Block Chevrolet engine
- Includes 16 bolts: 3/8"-16 x 1.5" with wide, underhead flange with a 7/16" hex head
- Rated at 170,000 psi and will give consistent torque load
- Includes 16 hardened flat washers
NOTE: Four of these washers are smaller in diameter for use around the front water passages.
CHROME WATER NECKS
12342024
Water Neck
- Chrome water neck with neoprene 0-ring and chrome bolts
- For 1966-1975 full-size Chevrolet, Camaro, and Chevelle V-8 engines
12342024
Water Neck
- Chrome water neck with neoprene 0-ring and chrome bolts
- For 1966-1975 full-size Chevrolet, Camaro, and Chevelle V-8 engines
10108470
Aluminum Water Outlet
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