Classic Ferraris are rare, valuable, and rarely ever seen in public. Most collectors treat their cars as museum pieces, ensuring the car is used as little as possible to keep it as close to factory fresh as it can be. Any collector that doesn't do this is sure to face the ire of both fellow owners and enthusiasts alike.

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That's why it's so scandalous when owners modify their classic Ferraris. Taking their prancing horse and customizing it to their tastes is seen as so unthinkable to many purists that every time a new project debuts that outrages others. Some builds though, just get it undeniably right. As sacrilegious as they might be to certain fans, these ten modified classic Ferraris look downright amazing.

10 This Liberty Walk 360

Ferrari 360 Liberty Walk
Via Pinterest

Liberty Walk is one of those tuners that car fans either love or hate. They're known for their wild and outlandish kits, with signature wide wheel arches and exposed rivets.

Ferrari 360 Liberty Walk
Via Twitter

This Ferrari owner in Japan has applied a Liberty Walk kit to their 360, creating one of the most insane builds around. Whether enthusiasts think it looks cool or disgusting, everyone can agree that it's certainly attention-grabbing.

9 Mitch Button's 328

Ferrari 328
Via Top Gear

The 328 is an archetypal classic Ferrari, and with this build Mitch Button has mostly kept those lines intact. The car sits significantly lower than a stock example, but full air suspension means the car can be raised again for better clearance when driving.

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Ferrari 328 Modified
Via Drive-My

The engine has also been fully upgraded, with a new ECU and other upgrades meaning it now produces a meaty 400 hp. It sounds righteous too, as the prancing horse's redline now sits at a sky-high 9,200 rpm.

8 F355 By Madlane

Ferrari F355 Madlane
Via Speedhunters

The ethos of Japanese builder Madlane is to respect the original design of the car in a format they call "OEM+". It's a more restrained way of modifying a car, so much so that casual Ferrari fans might not even be able to tell the difference from the outside. More keen-eyed fanatics will notice the Ferrari sits lower than stock, with a new set of BBS rims and a few other non-standard trim additions.

Ferrari F355 Madlane
Via Speedhunters

Madlane makes sure that there's no extra holes drilled or parts changed so that the F355 could be brought back to bone stock if its owner wants. That's still not enough for some Ferrari purists, who see even lightly modified Ferraris as sacrilege.

7 Jim Busby's 400i GTC

Ferrari 400i Jim Busby Racing
Via Forza Magazine

The 400i was fast for its time, though it wasn't the most popular in terms of sales. Race car fanatic Jim Busby decided he wanted to make it even faster, so he built this track-spec beast.

Ferrari 400i Jim Busby Racing
Via Edgar Motorsport

It sports a 5.7-liter V12 out of a Ferrari 575M, which can make up to 700 hp depending on Jim's setup. The car is also over a thousand pounds lighter than the original, being stripped of everything it didn't need.

6 Gas Monkey Garage F40

Ferrari F40 Gas Monkey Garage
Via GT Spirit

This F40 was unfortunately crashed in 2014, leaving it critically damaged and written off by insurers. It was then bought out by Gas Monkey Garage, who rebuilt the car fully into the form it exists in today.

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Ferrari F40 Gas Monkey Garage
Via Drivetribe

Being a custom build, it's obviously a lot less original parts-wise than most F40s, a fact that would turn off many collectors. Nevertheless, the car has been sold several times since Gas Monkey restored it, including once by the US Government after the car was repossessed from a convicted con man.

5 Liberty Walk's LB-WORKS 308 GTB

Ferrari 308 GTB LB-WORKS
Via Liberty Walk EU

Polarizing tuners Liberty Walk are back at it with this slammed and widened 308 GTB. This is their in-house example built to showcase their product, but the kit is also available for owners to buy and install themselves.

Ferrari 308 GTB LB-WORKS
Via Liberty Walk EU

It's the type of project that gets purists fuming, as the wide body kit installation means it's almost impossible to revert this 308 GTB back to stock. It's a bold move, but one that fans of widebody cars are well used to by now.

4 Evoluto Automobili's Confusing 348

Ferrari 348 Evoluto Automobili
Via WhichCar AU

The first thought for many Ferrari fans looking at this modded 348 will be, "but surely it's an F355?" Well, this is in fact a 348 that's been reworked to look like an F355, for reasons known only to the tuning house that made it.

Ferrari 348 Evoluto Automobili
Via Motoring Research

During the conversion the car has also had many modern elements added, with everything from the taillights to the alloys taking design cues from present-day Ferraris. It's a build that manages to look like several different Ferraris at once but somehow pulls it off.

3 This 2,500hp 288 GTO Cavallo Volante

Ferrari 288 GTO Cavallo Volante
Via YouTube

It claims to be the fastest Ferrari in the world, with an insane 2,500 hp. This is the "Cavallo Volante" 288 GTO, a 2,500-hp lightning rod designed for the Bonneville Salt Flats.

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Ferrari 288 GTO Cavallo Volante
Via Esquire

With all that power, heavy modifications have been made to keep this Ferrari the right way up. There's a huge rear wing, with a full racing parachute to slow the car down after the quarter-mile. It's one of the most utterly unhinged Ferrari builds ever.

2 René Ruch's Hillclimb F355

Ferrari F355 Rene Luch
Via Speedhunters

This F355 was built to be fast and make noise, and it does both of those things with aplomb. It's a hillclimb car, so naturally, it needed extra downforce to keep it sharp through fast corners.

Ferrari F355 Rene Luch
Via Speedhunters

It's got a full aero kit, including carbon fiber front wings and a huge rear spoiler. Mechanically it's also been thoroughly upgraded, with the original motor swapped with a 500-hp Zytek V8, mated to a racing sequential gearbox.

1 This Rally-Spec F40

Ferrari F40 Off Road
Via Motor Authority

With so many rare and valuable cars just sitting in collector's garages for decades, this modified F40 is a breath of fresh air. It's been beefed up to handle the snow, with rally-style front spotlights and snow chains to keep the car on the road.

Ferrari F40 Off Road
Via Pinterest

It looks insanely fun, and it's good to see this iconic car getting well used. As rare as they are, classic Ferraris were built to be driven, to be seen, and to be enjoyed. Drifting an F40 through the snow? There's no better way to enjoy one.

NEXT: 10 Most Extreme Ferrari V8s Ever Made