They do not have internal data logging capability and include a single oxygen sensor
Holley EFI Water and Methanol Injection Solenoid 600cc 400hp # HO557-103
Air Cleaner Filter:Blue cotton gauze
Requires the use of remote coil location brackets Holley has offerings for all popular LS coil applications
Combustion Chamber Volume (cc):
Chev 283 350 V8 1955 - 86 Weiand Black Speed Warrior Intake Manifold # WEI8150BK Rate_Engine They do not have internalChev 283 350 V8 1955 86 Weiand Black Speed Warrior Intake Manifold # WEI8150BK Intake Manifold, Speed Warrior, Aluminum, Black Ceramic, Non EGR, Square Bore, Chevy Small Block Gen I, Each Intake Section Included: Complete Engine Block Style: Stock OEM standard deck Carburetor Quantity: One Intake Style: Dual plane Basic Operating RPM Range: 1,500 6,700 Intake Manifold Height: 4. 730 in. Intake Finish: Black ceramic coated Intake Material: Aluminum