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  • Holley Straight Leg Booster Sizes .125 .135 .144
Holley Straight Leg Booster Sizes .125 .135 .144
Holley Straight Leg Booster Sizes .125 .135 .144
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Holley Straight Leg Booster Sizes .125 .135 .144

Holley
HP53S-35
In stock
$15.50
Holley Straight Leg Booster Sizes .125 .135 .144 Holley straight leg boosters are traditional venturi boosters found in standard everyday and baseline performance carburettors like the classic 600cfm & 350cfm...
$15.50
Holley Straight Leg Booster Sizes .125 .135 .144
.125 - $15.50
Description

Holley Straight Leg Booster Sizes .125 .135 .144

Holley straight leg boosters are traditional venturi boosters found in standard everyday and baseline performance carburettors like the classic 600cfm & 350cfm models.They offer reliable signal strength, good throttle response, and cost-effective manufacturing for general street use.

Characteristics and Design


Simple shape: Features a straight tubular leg design crossing the venturi.

Signal strength: Provides a moderate signal compared to stronger annular boosters or down-leg boosters.

Applications: Common in baseline 2-barrel (2300) and 4-barrel (4150/4160) street
 carburettors.

Orifice sizes: Available in various inner diameters (such as .125", .135", .144") to tune fuel atomization and signal booster response. 

Comparison: Straight Leg vs. Other Boosters


Straight Leg: Best for basic street driving, offering predictable signal and easy calibration.

Down-Leg / Dogleg: Angled downward to improve high-RPM fuel flow and directional delivery in performance applications.

Annular: Features a ring with multiple tiny discharge holes yielding the strongest signal at low speeds, ideal for heavy cars or large-volume intakes needing crisp low-end response

 

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We ship Australia-wide via Australia Post, with tracked shipping starting from $10.95. Orders are usually dispatched within 24–48 hours, with most deliveries arriving in 2–3 business days. Rural and remote areas may take up to 5 business days.

International shipping is available, with rates calculated at checkout. Local pickup is available from Echuca, VIC — please call ahead on 03 9989 9921 before visiting.

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Returns and exchanges may be accepted within 30 days of receiving your order, provided items are in saleable condition, include original packaging and proof of purchase. Returns are assessed case by case.

Change-of-mind returns, incorrectly ordered items, clearance items and products damaged through misuse or wear and tear are not returnable. Please contact us before sending back any item, especially for warranty claims.

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