Order Status & Returns
Gift Cards
Help Center
1-800-345-4545
![P1581(6)100 Dish Top Piston for 1988-1992 Buick, Oldsmobile, Pontiac 3.8L [+0.100 in. Oversize]](https://www.jegs.com/images/mini_750/400/416/416-p1581(6)100.jpg)
Vehicle Info NeededENGINETECHPART NUMBER: 416-P1581(6)100
P1581(6)100 Dish Top Piston for 1988-1992 Buick, Oldsmobile, Pontiac 3.8L [+0.100 in. Oversize]
$43799
Ships on 09/14/2026
Lowest Price GuaranteeGM
Piston1988-1992 Buick, Oldsmobile, Pontiac 3.8L Dish Top Piston Size: +0.100 in. Oversize Set of 6
The Enginetech P1581(6)100 is a replacement piston for GM/Buick, 3.8L 231 engines, sized at +0.100 in. Oversize. Engineered to OE specifications for reliable combustion chamber performance.
Enginetech P1581(6)100 Piston Features:
- Fitment: GM/Buick, 3.8L 231
- Size: +0.100 in. Oversize
- Turbocharged or supercharged application
- Engineered to OE specifications for direct replacement
Part TypePiston
BrandENGINETECH
Package Height3.75
Package Width9.25
Package Length13.75
Part CategoryReplacement Parts
Compression Height1.366
Size+0.100 in. Oversize
QuantitySet of 6
Oil Ring Thickness3.00
RemanufacturedNo
Bore Diameter3.799
Piston StyleDish
Piston Pin Outside Diameter0.9054
Second Compression Ring Thickness1.50
Top Compression Ring Thickness1.50
Piston MaterialCast aluminum
FitmentGM/Buick
Part FitmentDirect Fit
Engine Displacement3.8L 231
Vendor Part NumberP1581(6)100
Package Qty1
Package TypeEA
No Questions
No Reviews
Items You Need
![Engine Assembly Lube [4 oz. Bottle]](https://www.jegs.com/images/mini_200/500/555/555-28000.jpg)
![1-Ton Automotive Shop Crane [Boom Operating Range: 34 in. to 45 in.]](https://www.jegs.com/images/mini_200/500/555/555-81044k.jpg)
JEGS
1-Ton Automotive Shop Crane [Boom Operating Range: 34 in. to 45 in.]
Part Number : 555-81044K
$23698
![Rotating Engine Stand [1000 lb. Capacity]](https://www.jegs.com/images/mini_200/500/555/555-80059.jpg)
![Round Magnetic Parts Tray [5 1/2 in. Round]](https://www.jegs.com/images/mini_200/500/555/555-80080.jpg)
![Socket Set, 3/8 in. & 1/4 in. Drive [SAE/Metric 52-Piece]](https://www.jegs.com/images/mini_200/500/555/555-81565.jpg)
JEGS
Socket Set, 3/8 in. & 1/4 in. Drive [SAE/Metric 52-Piece]
Part Number : 555-81565
$2199$33.99
You Save$12.00
![Plier Set [5-Piece]](https://www.jegs.com/images/mini_200/500/555/555-w1717.jpg)
![Break-In Oil, 10W30 [1 Quart, 32 oz.]](https://www.jegs.com/images/mini_200/500/555/555-28067.jpg)
![Fender Cover with Pocket [23 in. W x 31 1/2 in. L]](https://www.jegs.com/images/mini_200/500/555/555-65010.jpg)
JEGS
Fender Cover with Pocket [23 in. W x 31 1/2 in. L]
Part Number : 555-65010
$1499$16.99
You Save$2.00
![Penetrating Oil [11 oz. Aerosol Can]](https://www.jegs.com/images/mini_200/600/639/639-11043.jpg)
![Brake Parts Cleaner [14 oz. Aerosol Can]](https://www.jegs.com/images/mini_200/500/555/555-72311.jpg)
JEGS
Engine Storage Bag 48 in. L x 35 in. W x 34 in. H
Part Number : 555-80039
$1199$12.99
You Save$1.00
![Mechanic Chair & Step Stool on Wheels [300 lb. Capacity]](https://www.jegs.com/images/mini_200/500/555/555-81156.jpg)
JEGS
Mechanic Chair & Step Stool on Wheels [300 lb. Capacity]
Part Number : 555-81156
$9099$111.99
You Save$21.00
![Heavy-Duty Steel Workbench [59.5 in. x 27.5 in. Bench Top]](https://www.jegs.com/images/mini_200/500/555/555-81440.jpg)
JEGS
Part Number : 555-81044K
$23698
Some parts are not legal for use in California or other states with similar laws / regulations
