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Enginetech ES691 Premium Engine Camshaft for Buick 1980-1981 Models
100% ORIGINAL AND QUALITY
EASY RETURN
- Description
- Fitment
- Warranty and Refund
- Reviews
New Premium Engine Camshaft
The Enginetech ES691 is a high-quality, premium engine camshaft designed specifically for Buick models from the late 1970s and early 1980s, including Century, Electra, LeSabre, Estate Wagon, and Regal. Crafted with durable cast iron or billet material, this camshaft offers reliable performance and longevity for engine rebuilds and restorations. Its hydraulic flat tappet lifter type ensures smooth operation, while the precise valve lifts and durations provide optimized airflow and power delivery. The exhaust and intake valve lifts are both set at 0.349 inches, with an advertised duration of 256 degrees at .050 inch lift, making it suitable for performance and stock applications alike.
The ES691 camshaft is compatible with computer-controlled engines, allowing for seamless integration with modern engine management systems. Its standard grade type ensures compatibility with a wide range of rebuild projects, providing a cost-effective upgrade without sacrificing quality. Whether you're restoring a classic Buick or replacing worn components, this camshaft delivers consistent performance, improved power, and durability, making it a reliable choice for engine builders and enthusiasts.
Engineered by Enginetech, a family-owned company with over four decades of experience, this camshaft reflects a commitment to quality and customer satisfaction. Designed for easy installation, it meets or exceeds OEM specifications, ensuring a perfect fit for your vehicle. The ES691 is a dependable choice for those seeking to enhance engine performance or restore vintage vehicles to their original specifications, backed by Enginetech's reputation for high-quality engine parts.
Features:
- Lifter Type: Hydraulic Flat Tappet for smooth operation
- Exhaust Valve Lift: 0.349 inches for optimized flow
- Intake Valve Lift: 0.349 inches for better airflow
- Grade Type: Standard ensuring compatibility and reliability
- Exhaust Duration at .050 inch Lift: 181.00 degrees for performance
- Intake Duration at .050 inch Lift: 181.00 degrees for efficiency
- Advertised Exhaust Duration: 256.0 degrees for power output
- Advertised Intake Duration: 256.00 degrees for airflow
- Cam Type: 1 for versatile engine applications
- Computer Controlled Compatible for modern engine management systems
Fits Following Models:
1978 Buick LeSabre
1978 Pontiac Bonneville
1978 Pontiac Catalina
1978 Pontiac Grand Am
1978 Pontiac Grand Prix
1979 Buick Century
1979 Buick LeSabre
1979 Buick Regal
1979 Oldsmobile Delta 88
1979 Pontiac Bonneville
1979 Pontiac Catalina
1979 Pontiac Firebird
1979 Pontiac Grand Am
1979 Pontiac Grand LeMans
1979 Pontiac Grand Prix
1979 Pontiac LeMans
1980 Buick Century
1980 Buick Electra
1980 Buick Estate Wagon
1980 Buick LeSabre
1980 Buick Regal
1980 Pontiac Bonneville
1980 Pontiac Catalina
1980 Pontiac Firebird
1980 Pontiac Grand Am
1980 Pontiac Grand LeMans
1980 Pontiac Grand Prix
1980 Pontiac LeMans
1981 Buick Century
1981 Buick Regal
1981 Pontiac Bonneville
1981 Pontiac Catalina
1981 Pontiac Firebird
1981 Pontiac Grand LeMans
1981 Pontiac Grand Prix
1981 Pontiac LeMans
| Lifter Type: Hydraulic Flat Tappet |
| Exhaust Valve Lift: 0.349 |
| Intake Valve Lift: 0.349 |
| Grade Type: Standard |
| Exhaust Duration At .050 Inch Lift: 181.00 |
| Intake Duration At .050 Inch Lift: 181.00 |
| Advertised Exhaust Duration: 256.0 |
| Advertised Intake Duration: 256.00 |
| Cam Type: 1 |
| Computer Controlled Compatible: Yes |
| Aaiaid Part Number: BBPTES691 |
| Part Number: ES691 |
| Brand Aaia: BBPT |
Returns
30-Day Money-Back Guarantee
We want you to be completely satisfied with your purchase! If you are not happy for any reason, you may return the item within 30 days for a refund, minus shipping fees, provided that: The part is brand new, uninstalled, and undamaged in any way.
To initiate a return, please contact us or email support@mizumoauto.com for a Return Authorization Number (RMA) and the return shipping address. Returns without an RMA number will be refused and returned to you at your expense.
Return Requirements:
- Items must be securely packed in the original manufacturer's packaging.
- All original materials must be included, such as hardware, manuals, protective caps, wrapping, and instructions.
- You must obtain and retain the tracking number for your return.
Non-Returnable Items:
- Piston rings, main bearings, and rod bearings are non-returnable if the manufacturer’s seal or shrink-wrapped plastic has been opened. No exceptions—this ensures the integrity of the parts you receive.
We are not responsible for lost or damaged returns. If your return is lost or damaged during shipping, a refund cannot be issued, as the item cannot be resold or returned to the supplier. Please file a claim directly with your shipping carrier for reimbursement.
Refunds are processed within 1-2 business days after we receive and inspect the returned item. Please allow this processing time before inquiring about your refund status.
Warranty
Mizumo Auto provides a 90-day Limited Warranty against defects in workmanship and materials under normal service conditions, effective from the original delivery date.
This warranty is non-transferable and applies only to the original purchaser. Coverage is limited to the replacement or refund of defective products.
Exclusions:
The warranty does not cover labor costs, damage resulting from accidents, misuse, alterations, or unauthorized modifications, as well as additional expenses such as towing, fluids, oils, car rentals, and any other parts not included in the original purchase.
Warranty Claims Process:
- All warranty claims must be pre-authorized and returned prepaid to Mizumo Auto for inspection and approval.
- No exchanges will be made for products that have been damaged, misused, or improperly installed. We strongly recommend professional installation.
- The buyer assumes all risk of damage resulting from improper installation.
All disputes related to transactions shall be resolved by a court of competent jurisdiction in Los Angeles County, California.
Shipping
We offer Free UPS Ground or USPS Ground Advantage shipping within the continental U.S. (48 states).
Shipping to Other Locations:
A delivery surcharge applies to shipments to: Alaska, Hawaii, Puerto Rico, U.S. territories, APO/FPO addresses, Canada, and international destinations.
Order Processing & Tracking:
- Orders are shipped Monday through Friday, excluding holidays.
- Orders placed before 3:00 PM PST will ship the same day, unless unexpected delays occur.
- A tracking number will be emailed within one business day after shipping.
If you do not receive a tracking number, please:
- Check your spam/junk folder.
- If it's not there, contact us via phone or eBay message for assistance.
International Orders:
Import duties, taxes, and brokerage fees are not included in the shipping fee. Please check with your shipping carrier and local customs office regarding any applicable fees before placing your order.









