Welcome to our Fall Website Refresh. Beta testing in progress. Phone Number: 805-267-9762 This month's discount code: HALLOWEEK3 

Welcome to our Fall Website Refresh. Beta testing in progress. Phone Number: 805-267-9762 This month's discount code: HALLOWEEK3 

Thorney Motorsport 2015-2017 Mclaren 675LT Stage 1 Power Upgrade

Stage 1 comprises an ECU remap upgrade with enhanced power and torque. No other mechanical modifications are required. Power is increased by 95bhp @ 4500 rpm, […]

$3,999.99

Available

Thorney Motorsport 2015-2017 Mclaren 675LT Stage 1 Power Upgrade

Stage 1 comprises an ECU remap upgrade with enhanced power and torque. No other mechanical modifications are required.

Power is increased by 95bhp @ 4500 rpm, and torque is increased by 160nm @ 4500 rpm. All of our dyno measurements are recorded at the wheels (you can calculate back to the flywheel by allowing for 15-16% power train losses (Mclaren stated drive train losses they have measured).

The map has been developed to be relatively calm at lower rpm; under 4,000rpm, the car feels relatively standard, but from 4000rpm to 8000rpm, it would be fair to say the performance is ‘shocking’. A wave of torque lifts the front of the car and squats the back down to such an extent that its hard to describe, it is an utterly transformed drive but retains complete smoothness with no peaks or troughs in the power delivery.  It’s such an improvement that if you dont like it we will take it off and refund you in full.

First Class Customer Service & Satisfaction.

At Function Factory Performance, customer service is our top priority. We know that finding the right parts can be overwhelming, so we’re here to make the process smooth and enjoyable. We’re always ahead of the curve with our commitment to education and awareness. Let’s make this experience simple and awesome together! Don’t hesitate to call us at (480) 576-8606 or click here to reach us via email.

Make sure to follow us on Instagram: @FFPerformanceAZ and Youtube.

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Frequently Asked Questions

How long does it take for my parts to ship?
If it’s in stock and ready to roll, your order usually hits the road within 1–3 business days.

For made-to-order or specialty items (like carbon fiber parts or custom builds), the turnaround can take up to 8 weeks — perfection takes time.

Either way, we’ll keep you updated so you know exactly when your parts are leaving the pit lane.
Do you send tracking with my order?
Absolutely. Once your order ships, you’ll receive an email with a tracking link so you can follow its journey from our shop to your doorstep.

If your order ships via freight, you’ll get a separate email with a direct link to the carrier’s tracking page — easy and stress-free.
What happens if my parts get lost or damaged?
Things happen on the road — even to boxes. If your order arrives damaged, snap a few clear photos of the box and product and send them our way right away.

If your shipment is lost, just email or call us — we’ll help track it down and guide you through the next steps to make it right.
What can I do to help FFP?
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Your feedback helps us grow, create more content, and keep bringing performance-driven parts to the community.

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