Are these made for square or round coils ?

The coil connection is a round rubber boot that goes over the ceramic protrusion of the coil and the electrode wire goes inside the coil. The coil boot is not square but round! Which was the case with my 2004 GMC Sierra.

Will these fit a 2002 Chevy Avalanche 5.3?

They should fit your 02 Chevy 5.3. I installed them on my 05 Chevy 5,3 and they fit perfectly.

Will these fit a 2006 gmc sierra 1500

i got a chevy with a 6.0 2004 and they fit great so i would say yes they are almost the same

Will these fit 2016 silverado 5.3l

They will fit .the wires are a little longer than the ac delco ones. On the passenger side the furthest away might have to make an adjustment to the heat shield. Check my pictures of my engine.

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JDMSPEED High Performance Spark Plug Ignition Wire For 2000-2009 CHEVY GMC V8

JDMSPEED High Performance Spark Plug Ignition Wire For 2000-2009 CHEVY GMC V8

Product ID: 306849239

Details

Brand
JDMSPEED
Connector type
Boot
EU Spare Part Availability Duration
1 Years
Item weight
0.45 Kilograms
Material
KEVLAR

⚡10.2mm Spiral Wound Design

🔥High Temp Silicone Boots & Sleeve

🛡️UltraLow Resistance KEVLAR Core

Description

⚡ Ignite your engine’s potential with JDMSPEED power!

TRUSTED BY PROS - Top-rated with 4.6 stars and a #7 rank in automotive wire sets—join the elite drivers.
PLUG PLAY READY - 100% new construction, ready for instant installation—no hassle, just power.
HEAT RESISTANT ARMOR - High-temp silicone boots and sleeves protect against extreme engine heat and wear.
KEVLAR CORE STRENGTH - Ultra-low resistance KEVLAR core ensures lightning-fast ignition and long-lasting performance.
PRECISION SPIRAL WOUND POWER - 10.2mm thick wires engineered for optimal spark delivery and durability.

JDMSPEED High Performance Spark Plug Ignition Wire features a 10.2mm spiral wound design with an ultra-low resistance KEVLAR core and high-temperature silicone boots, delivering superior ignition efficiency and durability for 2000-2009 Chevy GMC V8 engines. Rated 4.6 stars with a one-year warranty, it’s a professional-grade upgrade trusted by automotive enthusiasts.

Specifications

ASIN	B076G82DX3
Best Sellers Rank	#56,483 in Automotive ( See Top 100 in Automotive ) #17 in Automotive Wire Sets
Brand	JDMSPEED
Brand Name	JDMSPEED
Cable Type	Coaxial
Connector Type	Boot
Connector type	Boot
Country Of Origin	China
Customer Reviews	4.6 out of 5 stars 4,131 Reviews
EU Spare Part Availability Duration	1 Years
Item Weight	0.45 Kilograms
Item weight	0.45 Kilograms
Manufacturer	JDMSPEED
Material	KEVLAR, Silicone
Material Type	KEVLAR, Silicone
Model	D071
Part Number	D071
UPC	714131641352
Unit Count	1 Count
Wire Diameter	10.2 Millimeters
Wire diameter	10.2 Millimeters

Reviews

A**.

Quality plug Leads Suit LS 6 Litre

15.07.2024

C**S

Excellent upgrade

17.11.2025

ع**ي

ممتاز

التثبيت صعب نوعا مابعد الاستخدام سنه كانله. ممتازين تم الفك عدة مرات ويعملون مثل الجديد

8.04.2024

R**O

Excelente producto

Excelente calidad, material y en mi chevrolet silverado 2016 motor 5.3 funcionan sin problema alguno

26.01.2026

D**T

Great performance and price

25.10.2025

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