15.1     DESIGN AND CONSTRUCTION
15.1.1  All phases of design and construction are subject to the approval of the Race Director and/or Tech Official. The Promoter and/or Race Director may exclude any car, design or construction, which they deem unsafe or not meeting the specifications, the spirit and/or the intentions of the rules contained herein.
15.1.2  Any component used in the construction or assembly of the chassis and/or accessories must be approved by Tech or addressed in the following rules.
15.1.3  All cars will have a working clutch and start under their own power at all times or;
15.1.4  May use 21 pound or heavier flywheel and no clutch to replace the transmission. Must have rearend disconnect. Must be able to self start. Flywheel must be completely covered.
15.1.5  Weight Limit Rule: 1700 lbs minimum and 60.00% left side weight with driver in driving position.
15.1.6  Transmission: Manual transmission or big bell in-out box must be used. A non-shifting custom design may be used. If second gear is used as main drive gear, a minimum 3/16” thick scatter shield must cover the transmission in a manner to protect driver. NO automatic transmissions or fluid couplers allowed. The revolving part of the drive shaft must be completely enclosed by a tubing w/.125” minimum thickness. The tube may move up and down with the rear end. Torque tube hoop or safety strap is required.
15.1.6  Jointed rear driveline is allowed, must meet tech approval..
15.1.7  Brakes: All four corners must be hydraulic foot operated and in good working order.

15.2     FUEL SYSTEM:
15.2.1  Approved fuel cell or bladder is mandatory. Metal housing for fuel cell is optional.
15.2.2  No aluminum fuel tanks. 10 gals or less recommended. Locking type threaded caps only. No stock caps. Cell must be strapped with metal straps or securely mounted to chassis. Left side nerf fuel cell must include steel braided fuel line to chassis, locking aircraft type fuel cap, minimum 1” O.D .095 tubing specially designed to protect top and side impact, metal can/housing for fuel cell. One-way check valve must be installed on all fuel cells.
15.2.3  Stock 2 barrel 500 cfm Holley #4412 or Gas Comp # 4412. Choke plate must be removed for technical inspection. Must retain stock metering plate. May change jets and power valves for tuning. One (1") inch maximum spacer allowed. Pump fuel only.
15.2.4  Fuel pump may be electric or mechanical. Electric fuel pump must have oil pressure cut off switch.
15.2.5  Fuel line must have a ¼ turn shut off valve within easy reach of the driver, accessible from outside of the racecar is mandatory. No plastic or glass fuel filters. Fuel filters and fuel lines must be securely mounted. No ridged fuel lines.

15.3     CHASSIS AND BODY
15.3.1  All main roll cage and frame rails must be constructed of chrome moly steel tubing of at least 1 3/8” O.D. with a minimum wall thickness of .095”, any other sizes must be equivalent in strength. Cage must extend at least 2” above driver’s head. A halo bar may be required to meet dimensions. Diagonal braces in the balance of the cage must be of the same type of material but not the same O.D. The fame must be constructed so that the main, frame rails are inside the wheels. No lead weight filled tubing anywhere on car. The engine block must be inside the frame rails. All areas around driver must be padded; conventional steering boxes must have knee guards.
15.3.2  All cars must have floorboards and/or belly pans extending from the front firewall to the rear firewall and from frame rail to frame rail. No floor boards under the fuel tank. The firewall must be made of metal at least .032 “thick.
15.3.3  Minimum wheelbase is 85 inches. The minimum tread width is 48” to the center of the tire. The maximum width is 85” outside to outside of wheels. All wheels will use all available lugs to secure the wheel. Only aluminum or steel wheels allowed.
15.3.4  Nose, hoods, tailpieces and side panels are mandatory. Bodies must not extend more than 2” outside the frame rail. NO side foils, rudders or panels are to extend beyond the roll cage on any side. NO wedges or foils under the racecar. NO pieces may be added to the frame so as to resemble, imitate or be specifically designed to deflect, trap or from a windbreak of any kind, except those to cool/protect the motor and braking system. Nosepieces may be removed for cooling reasons.
15.3.5  Side nerfs must be within 1” of normal width of tires. No nerf bars with added weight allowed. Fuel cell, battery or approved weight ballast must bolt to the frame only with 5/16” minimum bolts. Front and rear bumpers must have a contact point of 18-20” above the ground with rear bumper contact point 6” in height and must not extend more than 4” past the frame width. NO part or attachment of the car can be wider than the outside of the nerf irons or extend past the rear bumper. No large gussets on bumpers. 15.3.6       No independent suspensions. Any coil over, torsion bar, leaf spring or combinations are allowed. Quick changes are allowed. Adjustable shocks are allowed, rebound only. No external adjustment, external reservoir, or gas charged type shocks allowed. The centerline of the engine block cannot be behind the center of the wheelbase. A maximum of 8 1/2 “ of offset measured from the crankshaft centerline to the center of each rear wheel is permitted.
15.3.7  Numbers must be on the nose and tailpieces. They must contrast with the body colors and be large enough for scoring to see.
15.3.8  No rear-view mirrors. No cockpit adjustable suspension allowed. Must have a quick release steering wheel.
15.3.9  All ignition switches shall be of a toggle design and mounted in plain sight on the dash on either side of the steering wheel. Ignition, fuel pump and fuel shut off must be labeled and marked in florescent orange or red. No switches under the steering wheel.
15.3.10            Battery: Securely mounted, dry cell, spiral cell or other non-liquid type battery only.
15.3.11            All cars must have burp tank of 1-gallon capacity. Overflow tube into the exhaust collector is not recommended.

15.4     SAFETY
15.4.1 See SECTION 3 MINIMUM SPECIFICATIONS.
15.4.2  All drivers can wear a minimum single layer Nomex uniform with Nomex underwear. May use double/triple layer suit w/no underwear. Nomex gloves, shoes, arm and helmet restraints are required.
15.4.3  Drivers Seat: Only aluminum or steel allowed. Must be bolted in to the chassis in 4 places*minimum., 2 on the bottom and 2 on the back near shoulder level. Each mounting hole in the seat must have a minimum 2” Dia/.060 thick reinforcement plate/washer. ALL subject to tech approval.
15.4.4  All throttle pedals must have toe return straps.
15.4.5  During any race or practice, any car that is the instigator of being three wide on the track will be penalized and/or black flagged for the racing event.

15.5     ENGINE GM 350 cid CRATE # 88958602 
(all rules subject to Section 5 Protest Procedures)
MS SEAL FEE, $8.00 per seal used (minimum 1, maximum 2) payable at time of re-seal.
15.5.1  Unaltered and complete General Motors sealed crate engine # 88958602.
All new engines (still in shipping crate) or used engines with factory 602 seals must be re-sealed by Meridian Speedway before installation or prior to first event of the 2010 season to avoid teardown or protest. Any rebuilds will be subject to approval by MS officials and shall be sealed by MS official(s) upon meeting the engine rebuild supplement specs and inspection.
Any approved or inspected rebuilds sealed prior to the first event of the season may avoid teardown or protest.
Any rebuild or un-seal completed without the approval or inspection of MS officials, or any rebuild or un-seal completed prior to 2010, will be re-sealed by MS officials upon entering the first event of the season for the car, it will be logged as "uninspected" and is subject to tear down according to the rules. The un-inspected engine will be determined legal for competition until determined otherwise.
Removal of any MS seal without approval or inspection shall be deemed illegal and thus unapproved. This action will result in loss of points earned to date and may result in confiscation of the engine in question as per rule 1.14.
ALL UNSEALED OR RESEALED ENGINES are subject to the provisions in the Suppliment for engine rebuild.
15.5.2  Maximum engine roll will be 5 degrees from vertical
15.5.3  No engine modifications will be allowed.
15.5.4  Valve springs, retainers and keepers must remain OEM and their size and installation specifications must remain within OEM spec and may be changed by competitor.
15.5.5  Castings and fittings cannot be changed
15.5.6  No machine work on outside of engine.
15.5.7  No aftermarket engine parts allowed. OEM ONLY (unless otherwise specified.
15.5.8  Flywheels: Aluminum or Steel with stock appearing clutch/pressure plate must be used. Aftermarket is allowed. Must be 10.4" minimum size. Minimum weight 21.0 lbs. 
15.5.9  Sprint car headers with mufflers only. Must meet DB rule in Section 3 -  Minimum Specifications.
15.5.10            Sprintcar timing cover, water pump and power steering  pump may be used if desired. Must be approved and sealed if so needed as per MS tech.
15.5.11

            15.5.12            When new Gm Crate engine is purchased it may be brought to the race track to receive MS seal.
15.5.13            GM Factory distributor as installed and delivered with 602 crate engine will be required and shall be unaltered with the exception of cap, wires and module.
15.6     TIRES / WHEELS
15.6.1              Class tires must be purchased through Meridian Speedway.
15.6.2              Steel or aluminum wheels are approved.
15.6.3              Six (6) tires may be purchased at the start of the year, tires may be replaced no sooner than (with exception of destruction there of) every four (4) consecutive races, except the right rear can replaced after every 3rd consecutive race. A "race" is considered only when you compete in all racing activities on that race date.
15.6.4              All tires purchased must be branded to be legal to race.
15.6.5              No tire softening or sipping allowed.
15.6.6              One (1) tire of each, to make a set of four (4), can be purchased from Meridian Speedway for practice only. Practice tires will be clearly marked and recorded for identification and are not allowed at the track on race days.
15.6.7              If any practice tire is found on any racecar or even on Meridian Speedway property on a race day, for any reason, the tire(s) will be confiscated, the driver will loose all year-to-date points and be fined $1,000.00. Furthermore, the car, driver and owner will be suspended from Meridian Speedway activities for three (3) consecutive Non Winged Sprint race dates.
15.6.8              Must run the Main Event and Heat Race on the same tires used to qualify. You may run any class tire purchased from Meridian Speedway (except practice tires) in the Trophy Dash.
15.6.9              Any competitor in the top 5 in points destroying a tire and replacing it with a new tire, the whole class has the option to buy one new tire to use in the same position on car.
15.6.10            Tire Sizes Allowed:
15.6.10.1         Right front tire: Hoosier 2030 ~ 11.0/24.0 -15
15.6.10.2         Left front tire:  Hoosier 2010 ~ 11.0/24.0 -15 
15.6.10.3         Left rear tire: Hoosier 2020 ~ 25.5/13.0 -15
15.6.10.4         Left rear tire: Hoosier M30 ~ 15.0/25.0 - 15 
15.6.10.5         Left rear tire: Hoosier M20 ~ 15.0/26.0 - 15
15.6.10.6         Right rear tire: American Racer 27.0 x 14
15.6.11            All new tires in purchased in 2010 will be branded/stamped prior to purchase. All tires will stay with the car/owner. If there is a driver change, the tires stay with the car.
15.6.12            Take-off tires from winged sprint class may be used if desired but must be branded/stamped/approved. No race limit on take off tires
15.6.13            no rubber or tire softening agents allowed
15.6.14            Tires must be branded/stamped to be legal to race

15.7     QUALIFYING - For racing events, scratch will be determined by 1 second off quickest time in qualifying