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Strap on your seatbelt as we take a glimpse at this 1963 Porsche Cabriolet.

How do you turn renderings of two world-trade-center towers and one transportation hub into one kick-ass -- and meaningful -- chopper design? Watch and learn.

As fabrication on the impressive Arabian Horse Bike continues, truer words -- "That is one big horse gas tank" -- have never been spoken.

Vinnie's shooting of a rabid raccoon brings about a lot of teasing.

After an exhaustive investigation, Mikey solves the mystery of who sent Paul Jr. Designs an X-rated cake (note to Jesse James: some lobster next time would be muh appreciated).

Ryan unveils the new Zippo Jeep at Nascar's Watkins Glen International. Will it be everything that Zippo wanted?

With the dimensions in, Rick Petko makes quick work of fabricating and mounting the fenders for the build-off bike, then muses on Paulie and Jesse's build-off bikes.

An almost innocent prank at Broadway Motors turns into an all-out war between Tommie and Mario.

Jason and the OCC team begin to go over design plans for the Donald Trump bike.

Mikey and the mayor of Montgomery, New York announce their weight competition to raise money for a local child named Will, who has been fighting leukemia.

As part of its restoration and re-branding, the Paul Jr. Designs crew begins to break down the Black Widow, stirring up a lot of decade-old memories for Vinnie, Junior and Cody.

When he runs into issues during the John Christner Trucking new-school bike's fabrication, Mike Ammirati has some creative -- and eye-appealing -- solutions.

The crew from Fast and Loud repaint a classic Ford truck they are restoring.

Watch as the gang from Fast and Loud put new hydraulic brakes in a classic Ford truck.

After replaying Junior's voice mail expressing his condolences regarding Helen, Senior decides on next steps for getting his family back together.

When the rear shock on the John Christner Trucking new-school bike doesn't cooperate, and workarounds don't fixing the bottoming-out issue, Mike Ammirati calls in the (new) springs.

Wanting to raise money for Will, a local child with cancer, in a weight-loss competition with Montgomery's mayor, Mikey hires a personal trainer to make him sweat. And hurt. A LOT.

Junior and his mom discuss the personal family issues surrounding the now-very-public death of Grandma Helen.

As they assemble the John Christner Trucking old-school bike -- Senior and Rick's favorite kind -- the OCC crew rib each other about the gas-tank size, recalling Jesse James' words during Chopper Live.

As they assemble the John Christner Trucking old-school bike -- Senior and Rick's favorite kind. -- the OCC crew rib each other about the gas-tank size, recalling Jesse James' words during Chopper Live.

In honor of their branding, Junior designed a purple bike for the March of Dimes.

Vinnie describes running into Mikey's apparently extremely effective "fill the diaper" roadside fundraising attempt for the March of Dimes.

The Allard J2 became an experimental prototype for a new generation of cars.

A British Engineering company has bought all of the remaining spare parts of the Jensen cars and is able to create and distribute most of them. Do they also have the tools to trace the original documentation for Wheeler Dealer's Jensen?

HowStuffWorks heads to Old Car City to check out owner Dean Lewis' incredible collection of classic junk cars and folk art, including thousands of pieces of Styrofoam cup art.