Edelbrock Part # 3706 Performer EGR intake manifold is designed for street 262-400 c.i.d. Chevy V8's that have heads with canted center bolt holes, 1987-1995. This intake manifold accepts late-model water neck, air-conditioning, alternator, H.E.I. and have rear water crossovers. For 1987-95 stock aluminum heads use #2101. Will not fit Chevrolet Bowtie or LT1 heads.INSTALLATION NOTES: • Manifold ht: A-3.50", B-4.60" • Carb pad height: 4.05" • Carb recommendations: OEM 4-Bbl, Edelbrock Performer Series # 1400, 600 cfm. • Port exit dimensions: 1.14" x 1.88" • Recommended intake gasket: GM # 10163409 • Use RTV sealant to properly seal end seals, such as Edelbrock High Temp Silicone sealant # 1076, DO NOT USE END SEALS GASKETS. • Sealant must be used on intake bolt threads if the threads extend into lifter valley or coolant passage. • NPT/Pipe thread fittings require the use of Teflon tape or paste on threads to ensure proper seal. • DO NOT OVERTIGHTEN NPT/Pipe fittings, this may cause the aluminum to crack around the fitting boss. NPT/Pipe thread is a tapered thread. • Hardened washers Must be used with intake bolts to ensure proper torque and prevent galling of the aluminum. • Choke plate # 8901 included • See adapter # 8035 for clamp-on EGR valve. • With carb # 1400 & # 3701, EGR spacer # 1476 is required. • The # 3706 has no provision for exhaust heated chokes. • Even though manifolds are compatible with EGR systems, this does not mean they are legal for use on emissions controlled vehicles. Check local laws for legality. • Proper installation is the responsibility of the installer. Improper installation will void your warranty and may result in poor performance and engine or vehicle damage.