Product Summary

Universal Fit, 1" Overall Thickness, Phenolic

  • Fits Holley 4150/4160 bolt pattern
  • Phenolic construction reduces heat transfer and increases power
  • Spacers lengthen the intake plenum increasing its volume, and speeding up flow
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Key Specs

MFG. Part #1351906
BrandSpeedway Motors
Carburetor Flange Type4-Barrel Square Bore
Overall Thickness1"
Material TypePhenolic
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Need To Know

Quick and Easy Returns

Return Policy

Speedway Motors 1351906 Details

Phenolic material is a type of plastic resin which has excellent insulating properties, so it will keep the fuel in your 4 barrel Holley 4150/4160 cooler for more power. For carbs with 1.467" diameter bores.
  • Fits Holley 4150/4160 bolt pattern
  • 1" tall
  • 4-hole design
  • 1.47" bore
  • Phenolic construction reduces heat transfer and increases power

CARB Warning

For race/ off road use or for use on pre-1966 vehicles.

Emissions warning: this part only legal for sale or use in California for racing (competition) vehicles which may never be used, registered, or licensed for use upon a public highway, or if installed in vehicles model-year 1965 or older; motorcycles model-year 1977 or older; or off-highway recreational vehicles (such as off-road motorcycles and all-terrain vehicles) model-year 1996 and older. Any other use renders the vehicle tampered and not legal for use on California public highways (any public street or roadway, public dirt road, public park, or publicly maintained right of way open to the use of the public for vehicular travel). Violations subject to $37,500 penalty per violation per vehicle, revocation of registration, loss of use on California public right of ways, and proof of correction for tampering. There are similar restrictions and penalties under federal law and the laws of all other states with penalties under federal law of up to approximately $45,268 per tampered vehicle and/or engine.

Speedway Motors 1351906 Specifications

KEY SPECS
MFG. Part #1351906
BrandSpeedway Motors
Carburetor Flange Type4-Barrel Square Bore
Overall Thickness1"
Material TypePhenolic
GENERAL
Carburetor Spacer Style4-Hole
Sold in QuantityEach
Bolt Hole Pattern5.63" x 5.16"
Hole Diameter1.47"
Gasket(s) IncludedNo
Hardware IncludedNo
NotesIncludes dowel pins.

Ratings & Reviews

4.6

5 Reviews

Overall Assessment

Customers highly appreciate our product for its top-notch quality, particularly praising its phenolic resin inner, which ensures better heat transfer. Users have found it practical, fitting perfectly and reducing carburetor temperature significantly, with one reviewer noting a 35-degree drop. Some users did encounter a minor issue with the cross in the spacer; however, it was easily rectified. In comparison to competitors, our product stands out as the more superior choice, echoed by a user's willingness to repurchase the adapter. Its usability, quality material, and safety make it a worthy purchase for customers.

4.6

5 reviews

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I would buy and recommend this spacer again and again

5.0

11 months ago

PastorFreddiek

Abilene, TX

Verified

This is old school carburetor spacer/heat dissipater quality. Works so well on intake manifolds with a plenum divider.

Would Recommend

Yes

5.0

a year ago

Monk

Fleetwood Pa

Verified

I used it on a 602 crate engine, I liked it because I could modify it to what I wanted and for the low cost

Would Recommend

Yes

5.0

3 years ago

Ken

Boise, ID

Verified

This is one of the few adapters that use phenolic resin inner. better heat transfer.

Would Recommend

Yes I would buy this product again

3.0

5 years ago

Minnesota Mad Man

Lakeville Mn

Verified

I was trying to use this on a 670 Holley on a 350 GM aluminum intake. The description reads to use this for 4150 series witch is what a 670 is. The problem was the butterflies would not clear the cross in the spacer. I cut the cross out and everything cleared. Will know for sure when I fire the engine. I think if I would have ordered the open spacer I would have been fine.

Would Recommend

Good Quality Product

5.0

8 years ago

Al B.

Gulf Breeze, Florida

Verified

The spacer was exactly as described, fit perfectly and is working as expected, reducing carburetor temperature by about 35 degrees compared to the intake manifold.

Would Recommend

Showing 5 of 5 reviews

Questions & Answers

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