would these fit into a 2009 chevy silverado 5.3lt?

Yes all 4.8,5.3,6.0 are the same length all years.and these will fit them all

Would this fit 1989 Chevrolet p30

No, they are not a fit for that Vehicle. You can go to MSD's Website, but you will need more information, such as Engine Size/Number of Cylinders. Here is their Website: https://www.summitracing.com/search/product-line/msd-8-5mm-super-conductor-spark-plug-wire-sets

Will these fit my 99 k25oo 454

All I can say is, they fit my 06 Sierra 2500 6 ltr...can't say about a 454, but i wish i had one :)

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MSD 32829 Super Conductor Spark Plug Wire Set, Red

MSD 32829 Super Conductor Spark Plug Wire Set, Red

Product ID: 1252987

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Details

Brand
MSD
Core Material
Thread Size
18mm
Top Material Type
Alloy Steel
Vehicle Service Type
Truck

⚡8.5mm thick high-conductivity wire

📏Precut to exact 8-11 inch lengths

🔧Bolt-on custom fit for precise installation

Description

⚡ Ignite your drive with precision and power!

VIBRANT RED FINISH - Stand out under the hood with a bold red design that signals high-performance and style.
LIGHTWEIGHT DURABILITY - Crafted from premium materials to withstand heat and wear while adding minimal weight to your engine bay.
EFFORTLESS INSTALLATION - Bolt-on design means quick, hassle-free setup—get back on the road faster and with confidence.
PRECISION ENGINEERED FIT - Custom-cut wires ensure seamless compatibility with your vehicle model—no guesswork, just perfect performance.
SUPER CONDUCTOR TECHNOLOGY - 8.5mm thick wires deliver superior electrical conductivity for maximum spark efficiency and engine power.

The MSD 32829 Super Conductor Spark Plug Wire Set features 8.5mm thick, precut wires ranging from 8 to 11 inches, designed for a perfect bolt-on fit. Its high-conductivity construction ensures optimal spark delivery, enhancing engine performance while the striking red finish adds a touch of style under the hood.

Specifications

Item Package Dimensions L x W x H	10.71 x 9.8 x 3.62 inches
Package Weight	0.65 Kilograms
Item Dimensions LxWxH	10.1 x 10.8 x 2.7 inches
Item Weight	1.76 ounces
Brand Name	MSD
Warranty Description	Warranty
Model Name	MSD 32829 Super Conductor Spark Plug Wire Set, 8.5mm thickness, 12 inches length
Color	Red
Material	Plastic
Suggested Users	unisex-adult
Number of Items	1
Manufacturer	MSD Ignition
Part Number	MSD-32829
Style	Spark Plug Wire Set
Included Components	MSD 32829 Super Conductor Spark Plug Wire Set, 8.5mm thickness, 12 inches length
Size	8.5 mm thickness, 12.5 inches length

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