Drivetrain› Shifters and Components

BullBoost

B Series Shifter Box Version 2

$144.95

SKU: 720053573763

In Stock
In Stock
Ships by Sep 12
Free Shipping over $200
$100 Minimum Order
30 Days Return
INSTALL DIFFICULTY
DIY PRO SHOP

Moderate — 2–4 hours

Overview

The BullBoost B Series Shifter Box Version 2 is a performance shifter upgrade designed for Honda and Acura models with B-series engines, including Civic Si EG, EK, and CRX. It features a Delrin bushing for smooth, durable shifting and a TPV bushing to protect the Delrin. The unit replaces the stamped steel base plate with a sturdier, rust-resistant 0.35" aluminum plate.
Show original supplier description
The BullBoost B Series Shifter Box Version 2 is a performance upgrade for Honda and Acura vehicles equipped with B-series engines such as the B16, B18, and B20. Key enhancements include the replacement of the original plastic cage with a Delrin bushing, chosen for its strength, chemical resistance, and low coefficient of friction, ensuring smooth operation over time. A TPV bushing covers the Delrin to maintain cleanliness. The stamped steel base plate has been upgraded to a robust 0.35" aluminum plate that resists rust and adds rigidity to the shifter assembly. To further enhance stability, an additional threaded hole is incorporated to triangulate the assembly. The shifter features an internally adjustable throw, managed via a 6061 aluminum black anodized lower adjustment shaft. This shaft is designed with notches for easy adjustment and a sight hole for clear measurement against the numbered internal steel shaft. The product is also noted to have a Delrin bushing and an aluminum plate thickness of 0.35".

Product descriptions are provided by our supplier partners and may not always be perfectly accurate. Not sure this fits? or call (760) 282-4645 and we’ll verify before you order.

Fitment

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Specifications

BrandBullBoost
Part Number720053573763
CategoryDrivetrain

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Returns & Fitment

Built for enthusiasts. Every order is backed by our 30 day return window on eligible items. Unused and uninstalled products may be returned with approved RMA and no restocking fees when received in new condition. Orders placed through the MOTORMIA app with a complete build qualify for our Fitment Guarantee — free return shipping if the part doesn’t fit your exact setup. The guarantee covers fit only; installation must follow manufacturer instructions, and we recommend a qualified shop for parts marked Difficulty 4–5.

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Shipping

Orders are processed in 1–3 business days. In stock parts ship promptly from our partner network. Special-order items either aren’t currently stocked or are built to your spec — expect 4–6 weeks. If a part goes on backorder while your order is in the queue, we’ll reach out and work through discounted alternatives together.

Free shipping over $200 in the continental US. Alaska, Hawaii, U.S. territories (Puerto Rico, U.S. Virgin Islands, Guam, American Samoa, and the Northern Mariana Islands), and international orders carry surcharges — most appear at checkout. Some exceptions (LTL freight, or suppliers who quote freight only after we place the order) won’t. In those cases we’ll reach out with the exact charge before your order moves forward.

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