Spark Plug Set (x8) - McLaren 3.8L & 4.0L
- Worldwide Shipping
- In stock, ready to ship
- Inventory on the way
A set of eight genuine spark plugs for the McLaren 3.8L & 4.0L Engine.
We recommend these spark plugs on Stock, Stage 1, 2 and 3 cars. These plugs come pre gapped ready for installation. The recommended torque spec for these plugs is 30nm or 22 ft-lbs. The recommended change interval is every 10K miles for optimal engine health and longevity.
This is an original McLaren part.
Recommended for:
- Stock
- Stage 1 Tuned
- Stage 2 Tuned
- Stage 3 Tuned
Compatible engine codes:
- All M838 engines
- All M840 engines
Compatible models:
- 12C
- 650S
- P1
- 540
- 570
- GT
- 600LT
- 620
- 675LT
- 720S
- 750S
- 765LT
- Senna
- Speedtail
- Elva
Over the years, the electrode wears away on spark plugs, causing too large of a gap and weak spark. Additionally, excess carbon can build up and bridge the gap to negatively effect performance.
Replace yours with these Genuine McLaren NGK plugs to regain your power, fuel efficiency, and smooth a poor idle.
The spark plug is essentially the first step in your engine’s combustion process. It forces electricity to arc across a gap, just like a bolt of lightning. The electricity must be powerful in order for it to cross the gap and create a quality spark. As the piston travels up the first time, compressing the air-fuel mixture inside the combustion chamber, the distributor sends an energy surge along the spark plug wire. When the surge reaches the spark plug, it fires, which ignites the air-fuel mixture. This explosion inside the combustion chamber forces the piston down again and is what creates the engine's Power!
Shipping Information:
Domestic Shipping:
- Standard Shipping: 3-5 business days (Free for orders above £100)
- Express Shipping: 1-2 business days (May vary on product ~£15)
International Shipping:
- Standard International Shipping: 7-14 business days (~£25)
- Express International Shipping: 3-5 business days (~£50)
Orders are processed within 24 hours and shipped out as quickly as possible. Tracking numbers are provided once the item has been dispatched.
Return Policies:
14-Day Hassle-Free Returns
We stand behind the quality of our products and want you to be completely satisfied with your purchase. If for any reason you are not, we offer a no-questions-asked 14-day return policy.
How to Return:
- Contact customer support within 14 days of your purchase.
- Securely package the item(s) you wish to return.
- Use a traceable shipping method to send the item back.
Refunds:
Once the returned item is received and inspected, we will issue a refund to your original form of payment within 5 business days. Please note that shipping costs are non-refundable. Additionally, a 15% handling charge will be deducted from the total refund amount.
Exclusions:
Custom or made-to-order items are not eligible for returns unless defective.
