Page 473 - 2020-2021 Racecar Engineering Drag Racing Parts and Accessories Catalog

2020 DRAG RACING

Throttle Return Kits Reusable Metering Plate Gasket
Throttle return kits attach directly to MOR65222
carburetor and are designed to clear most low-profile racing air MOR64919 Fits 4150/4160 carbs (Holley 108-29).
cleaners. Sold complete with one set of heavy and one set of light return
springs and necessary hardware. Drag Race Float Kit
MOR65228
Part No. Description
MOR64919 Throttle Return Kit, Satin Black, Holley 4150 Including HP Series Notched to clear 3/4" long jet extensions in carbs with
MOR64923 Throttle Return Kit, Chrome, Holley 4500 Dominator center-hung Holley float bowls. Alcohol compatible. Sold individually.
MOR64927 Throttle Return Kit, Satin Black, Holley Or Road, Speed Or Race Demon 4150/4160
MOR64929 Throttle Return Springs Only, Pair
Reusable Float Bowl Gaskets
Carburetor Spacers MOR65224
Moroso offers open plenum Buna-N compound with anti-wicking nylon backing. Used
and four-hole carburetor spacers in plastic, phenolic, wood, cast aluminum with alcohol or gas. Fits 4150/4160 carbs (Holley 108-32, 33). Two per kit.
,and billet aluminum. Spacers increase plenum distance for improved fuel Nylon Float Bowl Washer Kit
distribution and insulate the carburetor from the manifold. Stud installation
kit and gaskets must be purchased separately. MOR65225
For Holley carbs, ten per package.
Plastic Phenolic Wood Cast Alum. Billet Alum.
Description Part No. Part No. Part No. Part No. Part No.
Standard Flange Spacers Clear Sight Plugs
4-Hole Spacer, MOR65226
1/2" Tall, 1.75" Bores — MOR64943 — — —
4-Hole Spacer, For Holley carbs, two per package.
1" Tall, 1.75" Bores MOR64930 — — — MOR64996
Open Spacer, 1/2" Tall — — MOR65015 — MOR64985 Hex-Head Fuel Bowl Screws
Open Spacer, 1" Tall MOR64940 — — MOR64980 MOR64981 MOR65414
Open Spacer, 2" Tall — — — MOR64970 —
Dominator Flange Spacers Hex-head screws are 2-1/2" long and are more easily
Open Spacer, 1/2" Tall — MOR64947 — — — removed from Holley carburetors. Packs of four.
Open Spacer, 1" Tall — — — — MOR64951
High-Flow Squirter Screws
Carburetor Stud Kits MOR65442
“Bullet-nose” studs are rounded on one end to allow Fully radiused Allen head reduces turbulence, increasing air flow for
easy nut installation. Kits include four of each: studs, improved throttle response. Screws are for gas fed Holley carbs, sold
hardened flat washers, and nuts. individually.
Part No. Description
MOR37950 5/16" x 1-3/8", Fits Carbs With 1/2" Flange Base MOR37961 Holley Jet Extensions
MOR37960 5/16" x 2-1/2", Fits Carbs With 1/2" Flange Base And 1/2" Or 1" Spacer
MOR37961 5/16" x 3-1/2", Fits Carbs With 1/2" Flange Base And 1-1/2" Or 2" Spacer Thread into the metering block and space the jets back into the
fuel bowl, preventing fuel starvation. CNC-machined brass extensions must
Dominator Carburetor Adapter be used with MOR65228 float kit to clear extensions. Two per pack.
MOR65000 Part No. Description
MOR65440 Jet Extensions, 1/4"-32, Std. Holley Jets
Use adapter to bolt a Holley Dominator carburetor to MOR65441 Jet Extensions, 5/16"-32, HP Holley Jets
any intake manifold with a standard Holley 4150/4160
bolt pattern. Open plenum aluminum adapter is 2" thick. 1:1 Slip Link
MOR65444
Carb Caps Replaces the stock progressive link, converting it to provide simultaneous 1:1
Keeps dust and other foreign material out of carburetor. primary and secondary throttle opening. Fits all Holley 4150 carburetors.
Made of durable high-impact plastic.
Carburetor Linkage Bushing Set
Part No. Description
MOR65802 Fits Holley, Thermoquad And Q-Jet Carbs With 5-1/8" Dia. Neck MOR64920
MOR65803 Fits Holley Dominator Carbs With 7-5/16" Dia. Neck
Steel bushing adapts a 1/4" fastener to the 1/2"
diameter hole found in the throt tle linkage arm on Holley carbs.
Vacuum Line Cap Kit
MOR41090
Carburetor Drain Cup
Seal vacuum line connections at carburetors, MOR65805
intake manifolds, etc. Includes 20 vacuum caps Specially-channeled drain cup catches fuel spilled from fuel
in 1/8", 3/16", 1/4" and 5/16" sizes. bowl screws. Made from fuel-resistant polyethylene.

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