8mm Spiro Pro wire sets are for street & strip, off road, street rods, and custom cars. 8mm Spiro Pro wires are engineered to deliver superior performance with unsurpassed quality. They are the top choice amongst racers and enthusiasts alike with heat protection up to 600° Fahrenheit and 65,000 volts of dielectric strength.

Race Fit wires arrive cut to exact length and fully terminated — boots and terminals installed on both ends, ready to drop straight in. Note that lengths are optimized for the chosen routing path; if you're running a fixed loom or an alternate wire path, fitment may vary. An extra-long coil wire is also included, one end fully prepped and the other left open so you can trim to length and finish with the boot and terminal to your high-performance coil of choice.

• For Chevy Big Block Engines; sized to be routed either over the valve cover or under the headers and terminated for HEI distributors
• Spark Plug Wire Lengths (inches): 8 cylinders - 41, 38, 34, 32, 28, 28, 25, 22, coil 36
• 135° spark plug boot angle
• Black with Black Ceramic Boots
• 8.0mm outer silicone jacket is rated up to 65K volts and heat resistant to 600° Fahrenheit
• Silicone inner core provides heat protection and superior flexibility throughout its lifetime
• 350 ohms per foot
• Highly conductive stainless steel spiral wound core
• Superior RFI / EMI suppression for applications with CD or electronic ignitions, on board computers, stereos or pit radios
  
• Double spring lock spark plug terminals

Our ignition and exhaust products ship from our warehouse in Lenexa, KS. Our normal shipping time is 2-3 business days for in-stock parts.

• At this time, PerTronix does not offer expedited shipping options from our website.
  
  
• All packages must be inspected upon receipt for any missing or damaged goods and claims for such must be made within 7 days of receipt.
  
  
• PerTronix does not currently ship our products internationally from our web store. For international orders call 909-599-5955 or connect with us here.
  
  
• Once an item has tracking info, it cannot be cancelled. If you decide you don’t want the items after shipment, please take receipt of the item and process it via our return policy. Thank you for understanding!

Returns at Pertronix are accepted within 90 days of purchase with prior authorization, ensuring items are in new, resalable condition. To initiate a return, call for an RGA and follow provided instructions. Customers are responsible for return shipping, using a trackable method.

Refunds exclude initial shipping and handling fees and may be subject to a restocking fee. For defective or damaged items, contact Pertronix directly. We are not responsible for user-initiated damage/loss of parts.

For complete details, visit our Returns page.

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