GReddy Spark Plugs are designed in cooler heat ranges to reduce heat and chances of pre-ignition. The reason it is so durable is the very fine, 0.6mm dia. Iridium electrode. Iridium Tune Spark Plugs are ideal for low to medium tuned engines, factory turbocharged engines or bolt on turbo kit equipped vehicles. PRO Iridium Plugs add a Platinum ground electrode ensure even longer life in even the most extreme driving conditions. The Pro Plugs are geared toward high horsepower, higher boost applications and extra long life.

GReddy Spark Plugs use NGK heat range codes, so the larger the number the colder the heat range.

Returns; Defective and Damaged Merchandise

Defective and freight damaged merchandise (but only where IntakesandAccessories.com is providing shipment) may be returned to IntakesandAccessories.com for full credit, but only upon verification by IntakesandAccessories.com of such defect or damage. A Returned Merchandise Authorization ("RMA") form must be filled out by the Buyer and Approved by IntakesandAccessories.com. Credit will be issued to Buyer upon receipt of the RMA form and the claim approval from the freight company.

Returns; Exchanges; Good Merchandise

Returns of good merchandise may be accepted by IntakesandAccessories.com in its sole discretion under the following conditions:

Return/Exchange of merchandise in totally re-saleable condition, without markings on the original packaging will be restricted to extraordinary circumstances with prior approval from IntakesandAccessories.com. Accepted return will be assessed a 25% restocking charge. Returned part number shall not exceed 15% of total annual purchase quantities.

Return/Exchange of merchandise in packaging that has been marked, relabeled or otherwise defaced will be restricted to extraordinary circumstances with prior approval from your IntakesandAccessories.com. Accepted return will be assessed a 30% restocking charge, except that IntakesandAccessories.com merchandise returned in packaging that has been marked, relabeled or otherwise defaced will be subject to a 40% restocking charge. Returned part number shall not exceed 15% of total annual purchase quantities.

Merchandise classified by IntakesandAccessories.com as TB (To Be Discontinued), or DC (Discontinued), may not be returned for credit.

Merchandise on sales promotion or inventory packages may not be returned for credit.

Buyer must pay all return transportation charges.

Buyer must obtain and complete an RMA form, issued by IntakesandAccessories.com, for any good merchandise return or exchanges.

Returns/Exchanges will not be accepted under any circumstances after 15 calendar days after the ship date indicated by IntakesandAccessories.com.

Any returns for non-fitment or quality issues will require high quality digital pictures of the products to be emailed to the account manager before an RMA is approved.

Order cancellations will take up to 48 hours after a cancellation is requested before the order is officially cancelled and money processed for return.