Engines and Components› Camshafts and Valvetrain

ZZP

1.65 Rocker Arms

$299.99

SKU: ZZ-165RA

Special Order
Free Shipping over $200
$100 Minimum Order
Non-Returnable Item
INSTALL DIFFICULTY
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Easy — 1–2 hours

Overview

The ZZP 1.65 Rocker Arms are an upgrade to your factory rocker arm with a 1.65 ratio, increasing your current cam's lift by 3%. These rocker arms are designed to enhance aftermarket camshaft performance by slightly increasing valve lift and reducing valvetrain weight, saving 2 pounds total and over 27% weight compared to OEM rocker arms. They also reduce friction and the chance of valve float by decreasing valvetrain weight. These arms feature upgraded trunion bearings over stock rockers.
Show original supplier description
The ZZP 1.65 Rocker Arms offer a direct upgrade from stock 1.6 ratio rocker arms, increasing your cam's lift by approximately 3%. This enhancement is intended to boost the performance of aftermarket camshafts by slightly increasing valve lift. The design also focuses on reducing valvetrain weight, boasting a reduction of over 27% compared to OEM components, saving about 2 pounds in total. This weight reduction minimizes the effort required by the valve springs, thereby decreasing the likelihood of valve float and promoting smoother operation. These rocker arms feature upgraded trunion bearings for improved durability over stock units. They are compatible with supercharged, turbo, and naturally aspirated 3800 applications and are suitable for all Series II and III 3800 engines. No supporting modifications are strictly required, but it is essential to ensure adequate valve seal to retainer clearance due to the increased lift. The kit includes 12 rocker arms, 6 pedestals, and 12 rocker bolts. Stock pushrods will generally work, but checking lifter preload is recommended for optimal performance and to avoid potential issues like excessive preload (preventing starting) or insufficient preload (leading to valvetrain noise and damage).

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

BrandZZP
Part NumberZZ-165RA
CategoryEngines and Components
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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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