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Progress 89-91 Civic/CRX Series II Competition Coilovers 450/450-A1

Progress 89-91 Civic/CRX Series II Competition Coilovers 450/450

Part Number: 77.1002.4545

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$618.80 & Free Shipping

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special order
Typically ships within 2 to 3 weeks
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Spring Rate 450/450

These new systems have been redesigned with improved shock dampening rates, modern foam-type bump stops, and less part content for a simple and durable sport suspension system. This is a perfect system for street performance, new track day and autocross enthusiasts, as well as project cars with engine swaps.

We now are listing EIGHT SPRING RATE COMBINATIONS for our Competition Series II (CS2) coil-over systems for these popular Honda/Acura platforms.

Here is some help SELECTING YOUR SPRING RATE combination, all are noted by (front/rear):

D-SERIES/Single cam applications

Best ride for a daily driver (DD). Great for commuting. Front may bottom out if set up too low.

Good compromise, less understeer more fun. A modest concession to ride quality. This may be choppy for some drivers with short wheelbase models; Civic Hatch and CRX.

350/450 or 350/550
Minimal understeer, quick turn-in, less roll, fast fun, good for drag launch. Rides rough on bumpy or poor roads.


B/K-SERIES/Twin cam applications:

Best ride for a daily driver. Fun and well-mannered. Modest understeer. Recommended for street/performance daily drivers.

Good compromise, less understeer, less roll more grip.

Minimal understeer, awesome handling, quick steering response, good for drag launch. Rides rough on bumpy or poor roads.

550/550 Good for track cars equipped with a front end spoiler or splitter. Also for street cars running super-wide wheels tires and low ride heights. At this point, you should know you are signing up for a huge compromise in ride quality. Very stiff!


  • Front drop: 1" to 3" --- Rear drop: 1" to 3"
  • One year limited warranty
  • Kit does NOT include the black OEM top hats. This kit is designed to reuse the OEM top hats. See instructions below (PDF).
  • Actual product may be different than pictured

Images may be for reference only


Brand: Progress Technology
Part Number: 77.1002.4545
UPC: 810001072186

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