655 South Lincoln Ave San Bernardino Ca. 92408
Toll Free 877-470-2975 Fax 909-890-0703

(Small block or Big block)

Typically Aggressive Street and Autocross applications use the same components. The possible exception would be using higher front spring rates and adjustable shocks (double versus single). Autocross alignment and shock settings are quite different, for example, if you use an Autocross alignment setting on the street, you will wear the front tires out quickly. Some customers have two different sets of front springs allowing them to change back to a street application. This makes the coil-over very appealing because the springs are easily interchanged.

 Stage Four is geared towards (handling), road racing or auto-crossing. We do not recommend using Stage Four on the street because of ride harshness. Tubular upper and lower control arms are used here. Aggressive alignment settings are also used. Stage Four provides benefits in the following areas:

• Provides straight-line stability.
• Dramatically changes corner entry response.
• Controls alignment.
• Reduces nose-dive during braking.
• Improves rear axle control through leaf spring design and bushing system.
• Ride height is lowered 1-inch.
• Improves chassis stiffness.

Parts List with Part #:

1. Tubular upper control arm kit fully loaded with Del-a-lum upper control arm bushings and our new billet cross- shafts. Part # CTA-79A.
2. Tubular lower control arms CTA-79L fully loaded with Del-a-lum bushings.
3. Tubular Tie Rod adjusting sleeves Part # ADJ-2.
4. Fast Ratio Steering Box
5. Front sway bar use part # SB-138 (1-1/8 inch diameter) or SB-136 (1 inch diameter).
6. Front springs (Call for applications). Racing spring are not posted on the net.
7. QA-1 adjustable shocks Part # TC-1914P or Koni front shocks Part # 80-1914.
   Both shocks are adjustable. Depending on what spring rate chosen will influence the shock choice.
8. Interloc Subframe Bushings Part # 800 (stock height) or Part # 801 (1/2 inch drop).
9. Subframe connectors Part # 900 (Camaro/Firebird non-convertible, Part # 900C for convertible).
10. Del-a-lum rear leaf spring bushings and shackle kit part # 103SH.
11. QA-1 or Koni adjustable rear shocks (specify mono or multi).
    Rear Koni shocks Part # 80-1953 (stud type) or 80-1915 (1/2 inch bolt type).
    QA-1 shocks Part # TC-1953P (mono leaf) Part # TC-1915P (multi leaf).
12. Rear leaf spring L-2 or Cat5 rear leafs.

Rear leaf Part # L-2 is designed to control spring rap up. It can be used for road racing, drag racing, and performance street driving. Traction bars are not required with these springs. L-2 also lowers the car 1-1/4 inches. Category 5 rear leafs can be used with this application. Highly recommended for open track cars.

Possible kit # 1038. (1038 is a hardware pack that converts mono leaf spring cars over to multi leaf. If your car already has a multi leaf spring. You will not need a 1038 kit).

  Set toe to toe-in (3/32 total) long course, set toe to toe-out short course 1/16 out per side. Set toe by pushing out on the front of the tires. Notice the deflection in the steering system. There should be very little. The toe should be measured at this point.