What material are these made of?

Good quality steel with like a bakelite insert in the clamps. My favorite wire loom

This fit 63 impala -327 with headers? the mounting holes go on top of the triangular mounts for the valve cover?

I installed them on a 72 Chevy C10, 350ci, They fit well, no trouble with clearance on the headers.

Will 8.5 mm wires fit?

Yes, that is what I have but it is VERY tight

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Proform Spark Plug Wire Loom, Valve Cover Mount, 7-8 mm, Chevy Bowtie Logo, Aluminum, Chrome, Small Block Chevy, Kit

Product ID: 17477022

Details

Brand
ProForm
Connector Type
Clamp-in
Item dimensions L x W x H
240 x 96 x 24
Material
Aluminum
Wire Diameter
7 Millimeters

🏁Vehicle-specific Small Block Chevy design

🔩Durable aluminum chrome finish

⚙️7-8 mm precision fit

MX$6112

Duties & taxes included

In stock

Sold byAmazon MexicoDelivered byDesertcartCustomer service byDesertcartReturns14 days · 30 with PRO

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Description

⚡ Spark your Chevy’s style and performance with precision and polish!

EFFORTLESS INSTALLATION - Designed for quick, hassle-free mounting on valve covers, so you spend less time wrenching and more time driving.
PRECISION ENGINEERED FIT - Tailored 7-8 mm wire diameter ensures flawless routing and secure clamp-in connection for your Small Block Chevy.
SLEEK CHROME ALUMINUM BUILD - Lightweight yet robust aluminum with a polished chrome finish adds a premium, showroom-worthy shine under your hood.
ICONIC CHEVY BOWTIE BRANDING - Show off your Chevy pride with the unmistakable Bowtie logo, blending performance with style.
TRUSTED PERFORMANCE ACCESSORY - Ranked #10 in Automotive Performance Spark Plug Looms & Accessories with a 4.6-star rating from 246 enthusiasts.

The Proform Spark Plug Wire Loom is a vehicle-specific, 7-8 mm diameter aluminum kit designed for Small Block Chevy engines. Featuring a durable chrome finish and the iconic Chevy Bowtie logo, it offers a perfect clamp-in fit for neat wire routing and enhanced engine bay aesthetics. Highly rated and easy to install, this accessory combines function with standout style.

Specifications

ASIN	B000CMH2GG
Best Sellers Rank	#391,146 in Automotive ( See Top 100 in Automotive ) #3 in Automotive Performance Spark Plug Looms & Accessories
Brand	ProForm
Brand Name	ProForm
Cable Type	spark plug wire
Connector Type	Clamp-in
Customer Reviews	4.6 out of 5 stars 246 Reviews
Global Trade Identification Number	00036666301144
Included Components	Per Item Description
Item Dimensions	240 x 96 x 24 inches
Item dimensions L x W x H	240 x 96 x 24 inches
Manufacturer	Proform
Material	Aluminum
Material Type	Aluminum
Model	141-638
Number of Items	1
Number of Packs	1
Part Interchange Info	141-638
Part Number	141-638
UPC	036666301144
Unit Count	1 Count
Warranty Description	30 Days
Wire Diameter	7 millimeters

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