Product images and videos 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.
Engines and Components› Camshafts and Valvetrain
YELLA TERRA
GM LS3 Ultralite R/A Kit 1.70 Ratio Non-Adj.
SKU: Y00C YT6733
Moderate — 2–4 hours
Overview
Manufactured in Australia, Yella Terra has over 60 years of experience in performance engine parts. The Ultralite series is engineered to address valve float in high RPM ranges found in late model V8 and V6 engines, offering greater RPM potential with improved strength and durability.
Show original supplier description
Part #: YT6733
Rocker Arm - Ultralite - Shaft Mount - 1.70 Ratio - Roller Tip - Aluminum - GM LS-Series - Kit
Vehicle Symptoms
- Valve float at high RPM
- Loss of power above 6000 RPM
- Ticking noise from valvetrain
- Engine misfire under load
- Rough idle after high-speed run
Diagnostic Codes
- P0300 – Random or multiple cylinder misfire Det
- P0301 – Cylinder 1 misfire Det
- P0302 – Cylinder 2 misfire Det
- P0303 – Cylinder 3 misfire Det
- P0304 – Cylinder 4 misfire Det
- P0305 – Cylinder 5 misfire Det
- P0306 – Cylinder 6 misfire Det
- P0307 – Cylinder 7 misfire Det
- P0308 – Cylinder 8 misfire Det
Relevant Conversations
- LS valve float fix at high RPM
- Yella Terra YT6733 rocker arm review
- 1.70 ratio rocker arms for LS
- Best shaft mount rockers for LS3
- Ultralite rocker arm vs stock
- LS engine misfire above 6000 RPM
- P0300 after cam swap
- How to install Yella Terra rockers
- Shaft mount rocker arms benefits
- Yella Terra vs Harland Sharp rockers
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
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
| Brand | YELLA TERRA |
| Part Number | Y00C YT6733 |
About MOTORMIA
Buy with Confidence
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.
View Full Return PolicyShipping
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.
View Full Shipping Policy