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Misty Jain

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  • Published: Jun 09 2025 04:00 PM
  • Last Updated: Jun 09 2025 04:00 PM

This 2007 Porsche Cayman S packs a 911 flat-six engine, turning heads on Bring a Trailer. It’s a performance sleeper with true collector appeal.


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Have you ever been browsing car auctions and seen a car and thought, “That’s just an older Cayman—boring”? Maybe not in those words, but a bunch of you probably have. One car that has people in the auction world talking right now on Bring a Trailer is a 2007 Porsche Cayman S—for good reason. Beneath the Forest Green exterior, this car has a wrinkle: it has the heart of a 911.

What’s So Special About This Cayman?

On the surface, it looks like a well-preserved low-miles Cayman S—nice body, factory paint, clean beige leather interior. But as you check it out, you flip through the highlights and see what is bonkers: it has been swapped with a 3.6-liter flat-six from a 2007 Porsche 911. That is right; someone took the engine from a more powerful, rear-engine 911 and carefully transplanted it into this mid-engine coupe. That means serious performance, and a totally unique Porsche driving experience—it is like having 911 power, in a lighter, better balanced chassis.

A Clean, Well-Documented History (and Swap)

One of the reasons this Cayman's S is turning heads is how clean everything's been accomplished. This wasn't some shady job done in Joe's garage, it was done professionally in California with all documents and over $18,000 worth of work performed! The car has roughly 72,500 miles, while the swapped engine had approximately 35,000 miles at time of installation. Not only is it smog legal, California titled and passed inspection, but it's not just fast- it's street legal and friendly. With a clean Carfax and well-kept service history it's the type of car that inspires confidence in more serious buyers. 

911 Power in a More Nimble Package 

The 3.6L engine from the 911 produces about 325 horsepower versus the Cayman original of 295. And with the Cayman being mid-engine and having a lighter frame, that extra power makes this car feel really fast. Throw in the 6-speed manual transmission and you have a driving machine that has more balance than many modern sports cars. It's more than just top speed, though - it's about how it handles, how it sounds, and how it feels when you're on a curvy backroad. 

Incredible Comfort and Style

This is not a stripped-down race car. This car has every desirable feature offered by the manufacturer: heated leather seats, sport chrono package, Bose stereo, bi-xenon headlights, and ParkAssist. The interior is a comfortable driver space with Porsche quality and materials. The outside color, Forest Green Metallic, stands out in a parking lot full of silver sports cars. If you like cars that are stylish, comfortable, and deliver unique performance, then the Cayman does all three.

It May Sell For Much More Than You Anticipate

Bring a Trailer listings like this don't come around everyday, and buyers are paying attention. With that 911 engine, clean design, and manual transmission, this Cayman S is already getting heavy bidding. This car may get a price similar to a used 911 - impressive for a 2007 Cayman. But when you consider the care, parts, and rarity of the car, it makes sense. You're not buying just a car, you're buying somebody's exceptionally conceived version of the ultimate sleeper Porsche.

Table: Key Specs of the Modified 2007 Porsche Cayman S

Feature Details
Year 2007
Original Engine 3.4L flat-six (295 hp)
Current Engine 3.6L flat-six from 2007 911 (~325 hp)
Transmission 6-speed manual
Chassis Mileage ~72,500 miles
Engine Mileage ~1,000 miles since swap (~35,000 when swapped)
Exterior Color Forest Green Metallic
Interior Beige leather
Features Sport Chrono, Bose, heated seats, ParkAssist
Location California, USA
Auction Platform Bring a Trailer
Legal Status Smog-passed, clean Carfax, CA titled

Source(Image / Thumbnail): caranddriver

FAQ

It has a 3.6-liter flat-six engine from a 2007 Porsche 911, professionally swapped in California.

Yes, it passed California smog and inspection, has a clean Carfax, and is titled in California.

The 911 flat-six engine makes approximately 325 hp, up from the original Cayman S’s 295 hp.

Given its rare swap, clean history, and enthusiast appeal, it could be considered a collectible by Porsche fans.

The swap provides a significant power bump and a unique driving experience in the Cayman’s balanced chassis.

It may reach or exceed base 911 values, depending on auction interest and final bidding.

It could be, but it was done to a high standard with no shortcuts, so most buyers will see it as an upgrade.

The car is listed on Bring a Trailer, a popular US-based enthusiast auction site.

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