It was converted to steel in 2013 by Rocky Mountain Construction (RMC), led by designer Alan Schilke, and reopened as Iron Rattler.

RMC installed their patented I-Box track onto Rattler's existing wooden structure, increasing the drop height from 124 to 171 feet (38 to 52 m) and the maximum speed from 65 to 70 mph (105 to 113 km/h).

The transformation of the ride to Iron Rattler was well received, and it has frequently ranked in the top 50 among the world's best steel coasters in the annual Golden Ticket Awards publication from Amusement Today.

Designer John Pierce stated that the original plans kept changing as park co-developers Gaylord Entertainment Company insisted on having the tallest wooden coaster in the world.

[7] At the IAAPA 2011 Trade Show, Alan Schilke of RMC revealed that the company had two projects that it would be working on for 2013 openings – one of which was an I-Box conversion of a wooden roller coaster.

The renovation would be performed by Rocky Mountain Construction and would feature the I-Box steel track on some of the original wooden coaster supports, Rattler-themed trains supplied by Gerstlauer, and a barrel roll.

[21][22] Iron Rattler is located in the Western-themed Crackaxle Canyon area of Fiesta Texas, sitting next to the Road Runner Express and The Gully Washer.

The original ride by the Roller Coaster Corporation of America was approximately 1,800 feet (550 m) longer due to a 900° helix atop the quarry walls.

The refurbished ride by Rocky Mountain Construction features a steeper and longer first drop, thus achieving a faster speed.

Keith Miller of Funworld Magazine described the ride as "wonderfully smooth" highlighting the slow cresting of the lift hill as an "enjoyable element".

Levine applauded Six Flags for replacing a bad wooden roller coaster with "a wonderful, remarkably smooth, thoroughly fun and enjoyable ride".