Engines and Components› Cylinder Heads and Components

Airflow Research

PACALOY SOLID ROLLER SPRING 1.625 O

$444.64

SKU: A03K 8031-16

Special Order
Special Order
Ships in 4–6 weeks
Free Shipping
Non-Returnable Item
INSTALL DIFFICULTY
DIY PRO SHOP

Moderate — 2–4 hours

Description

The Airflow Research 385CC BBC Rectangle Port Cylinder Head is designed for +540 cubic inch large displacement racing engines, featuring 100% CNC machined intake runners, exhaust ports, and combustion chambers. It includes PAC Racing #1224 valve springs, part number 8031-16.

Fitment

Fitment Guaranteed

Don’t gamble
on fit.

Log your build in the MOTORMIA app and we’ll guarantee this part fits your exact setup — or your money back, return shipping covered.

Available on iOS & Android

Specifications

BrandAirflow Research
Part NumberA03K 8031-16

Videos

AFR 265 BBC Heads... (Lets take a look at them)!!👍#11 Chevy 454 Big Block Performance Build..

AFR 265 BBC Heads... (Lets take a look at them)!!👍#11 Chevy 454 Big Block Performance Build..

Buy with Confidence

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.

View Full Return Policy