Porsche Manthey Kits in Thousand Oaks at Porsche Westlake
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You bought a GT car because you wanted the sharpest Porsche on the road. A Manthey Kit is how Porsche takes that car one step further, with parts proven on the Nürburgring and approved for the street.
A Porsche Manthey Kit is a road-approved performance package for select Porsche GT models, including the 911 GT3, 911 GT3 RS, 718 Cayman GT4 RS, and Taycan Turbo GT. Each kit adds model-specific aerodynamics, chassis tuning, and brake upgrades developed by Manthey, the Nürburgring-based motorsport specialist.
At Porsche Westlake in Thousand Oaks, our team helps Conejo Valley GT owners check which kit fits their car and what it includes. Below, you'll find the benefits, the full model list, and answers to the questions we hear most.
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Who Is Manthey, and Why Does Porsche Offer Its Kits?
Manthey is a German motorsport and performance company based near the Nürburgring, with about 30 years of experience racing and developing Porsche cars. Porsche offers Manthey Kits through Porsche Centers because each kit is developed for a specific GT model and approved for road use.
Manthey's record includes overall wins at the Nürburgring 24 Hours and class victories at Le Mans. The 911 GT3 RS kit went through two years of development and endurance testing before release, and the latest 911 GT3 wheels were developed with Porsche in Weissach.
What Are the Benefits of a Manthey Body Kit?
The main benefits of a Manthey Kit are more downforce, sharper chassis control, and more consistent braking, all while the car stays road-legal. According to Porsche, the 911 GT3 RS Manthey Kit generates more than 2,200 lbs of downforce at about 177 mph.
More Downforce Where It Counts
Each kit reworks airflow over and under the car. On the 911 GT3 (992.2), that means a wider swan-neck wing with a Gurney flap, larger end plates, an extended front lip, front diffuser fins, and carbon fiber aerodiscs. Porsche rates this kit at up to 1,190 lbs of downforce in its most aggressive setting (track use only), with no added drag.
Suspension You Can Tune
The 911 GT3 (992.2) kit uses four-way adjustable coilovers you can set without tools. The 911 GT3 RS kit uses semi-active coilovers with spring rates up to 30% higher, plus real-time damper control you can adjust from the steering wheel in Track mode.
Braking That Holds Up Lap After Lap
Braided steel brake lines for near-immediate pedal feedback
Optional racing brake pads for better fade resistance across a wide temperature range
Enlarged 440 mm (about 17.3-inch) front ceramic composite discs on the Taycan Turbo GT kit
Lighter Wheels, Less Unsprung Weight
Optional forged 20- and 21-inch wheels for the 911 GT3 (992.2) cut unsprung mass by a combined 13.2 lbs, helping the tires stay planted over uneven pavement.
What Models Does Manthey Make Kits For?
Porsche lists Manthey Kits for nine models: the 911 GT3, GT3 with Touring Package, and GT3 RS (992), the 911 GT3 (992.2), the 911 GT3 RS and GT2 RS (991), the 718 Cayman GT4 and GT4 RS, and the Taycan Turbo GT with Weissach Package. Every kit is specific to its model and generation.
Lap times were set by professional drivers under controlled conditions, some on optional track tires. Your results will vary. Kit availability, components, and pricing vary by model and market.
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Built for Mulholland Mornings and SoCal Track Days
Conejo Valley drivers live next to some of the best roads in California. Mulholland Highway, the canyons down to Malibu, and the Pacific Coast Highway reward a car that turns in sharply and stays composed.
Track days at circuits like Willow Springs and Buttonwillow ask more of the car, and road approval means you can drive there, run your sessions, and drive home in the same car. Only a few items, like the optional tow straps, come off before you head back onto public roads.
Planning to keep your GT car for years? A factory-backed kit gives you Nürburgring-proven parts designed for your exact model.
Why Conejo Valley GT Owners Work With Porsche Westlake
Fitment guidance for your exact car. We confirm your model, generation, and package before you commit to a kit.
Porsche-trained technicians who use Porsche Genuine Parts and factory procedures.
Complimentary Pit Stop Service before a road trip or track weekend, with a fluid top-off, tire check, and underside look alongside a Porsche Certified Technician.
GT inventory, new and pre-owned. Porsche Westlake has been named the top Porsche Approved Certified Pre-Owned center in the nation for six consecutive years.
Manthey-certified Porsche Center
What Thousand Oaks Drivers Ask About Manthey Kits
GT owners usually come to us with the same handful of questions. Here are straight answers to the ones we hear most.
Is a Manthey Kit the Same as an Aftermarket Body Kit?
No. Most body kits change how a car looks, while a Manthey Kit is a Porsche-offered performance package tested on track for downforce, handling, and braking. Each kit is engineered for one specific GT model and generation, and every kit is road-approved.
What Parts Come in a Manthey Kit, and What Is Optional?
Core kits center on aerodynamic parts like wings, underbody panels, diffuser fins, and carbon fiber aerodiscs. Depending on the model, coilovers, racing brake pads, braided brake lines, forged wheels, and tow straps may be optional or sold separately, so you can build the kit around how you drive.
Does a Manthey Kit Affect My Porsche Factory Warranty?
For the 911 GT3 (992.2) kit, Porsche states that the components do not compromise the existing factory warranty. Coverage details can vary by model, kit, and installation, so our Porsche Westlake team will confirm the specifics for your car before you place an order.
Can I Drive a Porsche With a Manthey Kit on the Street?
Yes. Manthey Kits are road-approved, so you can drive your GT car on Conejo Valley canyon roads and the 101. A few setups are track-only, like the most aggressive aero setting on the 911 GT3 (992.2), and optional tow straps must come off before you drive on public roads.
Where Can I Ask About a Manthey Kit Near Thousand Oaks, CA?
Porsche Westlake on Auto Mall Drive in Thousand Oaks, CA is a convenient stop for GT owners from Westlake Village, Agoura Hills, Newbury Park, and Camarillo. Our team can confirm kit fitment, current availability, and next steps for your specific model.
How Much Does a Manthey Kit Cost, and Can I Finance It?
Manthey Kit pricing varies by model, optional components, and market, so we provide a current quote for your specific car. If you're buying a GT model at the same time, our finance team can walk you through Porsche Financial Services options for the vehicle purchase.
How Do I Get Started With a Manthey Kit at Porsche Westlake?
Start by contacting our team with your model, model year, and how you plan to drive the car, from weekend canyon runs to regular track days. We'll confirm which Manthey Kit fits, explain what's included, and outline the next steps for ordering.
Start Your Manthey Kit Conversation in Thousand Oaks
Porsche Westlake on Auto Mall Drive in Thousand Oaks, CA works with GT owners across the Conejo Valley, Westlake Village, Agoura Hills, Camarillo, Oxnard, Malibu, and Los Angeles. Tell us about your car and how you drive it, and we'll help you find the right kit.
Contact our team about Manthey Kits or browse our 911 inventory to find your next GT car.
