Name: SPEEDTECH 1963-1967 CORVETTE C2 CHASSIS IRS
SKU: 5780
Availability: InStock

63-67 C2 Corvette ExtReme IRS Chassis

1963-67 C2 Corvette ExtReme IRS Chassis Base Package $32,349 + $900 Crating Fee Includes:
• Full Speedtech Performance ExtReme chassis
• Custom designed upper and lower control arms
• JRI coil over shocks tuned exclusively for Speedtech Performance
• Tuned, adjustable, splined sway bar with options for street, pro-touring/auto cross and ExtReme race
• Sweet Mfg. dual power rack and pinion steering, heavy duty for wide tires.
• ExtReme forged spindles with C7 hubs
• Fully adjustable transmission cross member
• Independent Rear Suspension (IRS) traditional mounting under the car
• Improved location of Center of Gravity
• Industry leading design has roll center engineered to the optimum location in the chassis
• Box welded construction with tabbed through frame gusseting for added torsional rigidity
• Excellent comfort on the street, durable for autocross & track days
• Ride height adjustments accommodate your styling needs from mild to wild

C2 ExtReme Chassis Features:

Front
• Exclusively equipped with the new, forged 7075 Aircraft Aluminum, ExtReme ATS spindle
• Corrected Ackerman for better grip while cornering up to 20% more inside tire grip when cornering
• Virtually zero bump steer – .005” standard over full travel (can be tuned)
• Up to 30 deg of steering angle equal to or slightly more than OE
• Increased shock length providing more suspension travel
• 0.78 motion ratio for faster shock response and more precise control and better ride
• 3-piece Chromoly tubular splined sway bar standard
• Stainless steel 2 joint steering shaft kit
• Front Hub to Hub 58”
• ExtReme wheel and tire widths without styling changes to the body – 18X10, 8.25 back space, 295/30/18 with full steering

Rear
• Traditional under car mounted shocks with improved motion ratio
• Fully adjustable geometry including Caster, Camber, Toe, and Roll Center
• Wheel and tire can be removed without any other disassembly
• Reduced unsprung weight
• Durable black Cerakote on axles shafts
• Standard IRS rated to 1000 horsepower

• Cast aluminum center housing
• 55.5” Hub to Hub
• ExtReme wheel and tire widths without styling changes to the body – 18X10.5, 7.75 back space, 325/30/18

The New ExtReme Forged Spindle Features:
• Forged from high quality, light weight 7075 aerospace aluminum
• We took the best forged aluminum spindle made and made it better
• Optimized geometry unmatched in any other Corvette style spindle
• Significantly improved KPI/SAI angle
• Requires less caster to achieves optimum tire contact patch
• Significantly less scrub radius
• Billet steering arm provides increased Ackerman angle
• Achieves optimum tire slip-angles to provide increased front tire grip
• Maintains optimum tire grip with less backspaced wheels
• Brakes are direct carryover from C5 & C6 Corvette opening up many options
• Comes standard with maintenance free factory GM C7 Corvette hubs & bearings
• Excellent design attributes for street cars and race cars
• From parking lots to tracks, it simply drives & turns better

Option – High Shock Mount Rocker Arm IRS $3000. (COUPE ONLY)

• Cantilever shocks, visible in trunk, deliver .8 motion ratio for optimized performance
• Exclusive Speedtech award winning design
• ExtReme Spindle forged from high quality, light weight, 7075 aerospace aluminum
• Standard 934 CV joints and 35 spline inner Stub shafts
• 33 Spline outer stub shaft with Corvette C7 drive hub
• JRI single adjustable shocks (double and Tripple adjustable also available)
• Cast aluminum 9” housing
• Requires window in floor for IRS system

Requires
• Factory A/C delete
• Battery Relocation, either side behind the front wheels
• Ididit tilt steering column necessary for proper steering shaft clearance start at $594 black powder coated
• Modify front inner wheel wells – can use our Camaro widened wheels wells and cut to fit $899
• Recommend Dynamic Corvette rear mini tubs for 10.5” wide wheel
• Transmission tunnel cover kit, for 4l80e or T56 price dependent on Manual of Auto
• Mid length header, same exhaust routing needs oval pipe
• Body mount kit $199

Options
• Headers, 321 stainless steel, slip fit, high clearance, designed specifically to work with our steering kit for the
with an LS $1699
• (Only if picking up, no crate) Frame blasted and powder coating Satin Black $1000
• Rear end and third member powder coating $350
• Billet aluminum body mounts anodized black $199
• LS motor mount adapter plates $150 Energy Suspension motor mounts $62
• 3 piece splined rear sway bar $529
• Shaft Kit for use with our headers $269
• Stainless Steel notched Rick’s Tank price depends on pump options
• Pro Street Strange Nodular Iron case with Tru-Trac. Motive or Eaton 3.73 gear set, aluminum pinion support, and
forged 1350 yoke $1899
• PRC Aluminum crossflow radiator with twin Spal fans, shroud, billet overflow, billet rad cap all wiring and relays
custom built to fit the ExtReme frame with an LS engine $Request Quote

Brake Options:
For street use
• Wilwood front 4 Piston 12.88″ drilled and slotted rotors, for AFX spindles $1090
• Wilwood rear 4 Piston 12.19″ drilled and slotted rotors with internal parking brake made for our 9″ $1185
For street and some autocross
• Baer 6 piston 14” drilled and slotted front brakes $2395
• Baer 6 piston 14” drilled and slotted rear brakes with internal parking brake $2659
• Baer billet master cylinder kit $535
For street and autocross
• Wilwood special Aero 6 piston 14” sub special calipers front: $2738
• Wilwood Special Aero 4 piston 14” sub special calipers rear with internal parking brake $2410
• Wilwood manual 7/8” master cylinder kit with prop valve $369

• Wilwood emergency brake cable kit $139
• Wilwood front braided hose line kit $80
For road course and spirited street
• Baer 6S Extreme+ 14” rotors, 6 piston Caliper Front $3395
• Baer 6S Extreme+ 14” rotors, 6 piston Caliper Rear – with integrated Parking Brake $3665
COST OPTIONS
• XTR 2618 Aluminum Forged Caliper $875
• 15” rotors $400
• R-Spec full floating rotors $695

*SHIPPING COST NOT INCLUDED AND CAN ONLY BE QUOTED AFTER THE PARTS ARE PICKED*