Tokico Illuminas and IROC springs?
Thread Starter
Joined: Oct 2005
Posts: 520
Likes: 1
From: Fallston, Maryland
Car: 1989 Trans Am GTA
Engine: 350
Transmission: T56
Axle/Gears: 9 Bolt 3.70
Tokico Illuminas and IROC springs?
Does anyone have Tokico Illumina struts and Moog 5664 and 5665 (IROC) replacement springs on their car? What do you think about this combination? Even if you don't, I'd still like your input.
Joined: Aug 1999
Posts: 19,282
Likes: 103
From: Lawrence, KS
Car: Met. Silver 85 IROC/Sold
Engine: 350 HO Deluxe (350ci/330hp)
Transmission: T-5 (Non-WC)
Axle/Gears: Limited Slip 3.23's
Joined: Sep 2003
Posts: 25,895
Likes: 429
From: Pittsburgh PA
Car: 89 Iroc-z
Engine: 555 BBC Turbo
Transmission: TH400
Axle/Gears: MWC 9” 3.00
Re: Tokico Illuminas and IROC springs?
i got the tokico illumina 5 way adjustables and Eibach Prokit springs. You can really adjust the ride quality and handling feel with those tokicos and they match the stiff prokit springs well. I feel they should also match those Irocz springs just fine as well.
Supreme Member
Joined: Jun 2005
Posts: 1,800
Likes: 2
From: Bremerton, WA
Car: 1992 RS / 1989 RS
Engine: 3.1L MFI / Vortec 383 TBI
Transmission: T5 / LS-T56
Axle/Gears: 3.42 open / 3.73 Eaton posi
Re: Tokico Illuminas and IROC springs?
I have those shocks/struts on my 89 RS with WS6 springs that came from a 1987 Formula. BIG improvement over the stock stuff that was originally on the car. Also upgraded the sway bars from 30mm/18mm stock to 34mm/24mm. Pretty stiff ride now.
Thread Starter
Joined: Oct 2005
Posts: 520
Likes: 1
From: Fallston, Maryland
Car: 1989 Trans Am GTA
Engine: 350
Transmission: T56
Axle/Gears: 9 Bolt 3.70
Re: Tokico Illuminas and IROC springs?
Something I forgot to ask; those of you who are running Illuminas, what setting do you like to keep them on?
Joined: Sep 2003
Posts: 25,895
Likes: 429
From: Pittsburgh PA
Car: 89 Iroc-z
Engine: 555 BBC Turbo
Transmission: TH400
Axle/Gears: MWC 9” 3.00
Re: Tokico Illuminas and IROC springs?
depends on what i'm doing. basic comfortable street driving (which i dont realy do anymore
) with the ProKit springs i have, i like to keep the front at 2 or 3 and the rears at 3 to 4. performance driving/max handling feel on the street, i keep the front at 5 (stiffest) and the rear at 4. the ride is hard but not all that bad i got used to it.
drag racing i keep the front at 1 or 2 and the rear at 3 or 4.
) with the ProKit springs i have, i like to keep the front at 2 or 3 and the rears at 3 to 4. performance driving/max handling feel on the street, i keep the front at 5 (stiffest) and the rear at 4. the ride is hard but not all that bad i got used to it.drag racing i keep the front at 1 or 2 and the rear at 3 or 4.
Senior Member
iTrader: (2)
Joined: Feb 2006
Posts: 619
Likes: 0
From: Wilmington,NC
Car: 87 trans am
Engine: 305
Transmission: T5
Axle/Gears: 3.42 SLP rear
Re: Tokico Illuminas and IROC springs?
My fronts are on 3 and my rears are on 4 or 5.
Yeah, I know... I like it that way.
Yeah, I know... I like it that way.
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Member
Joined: Oct 2005
Posts: 126
Likes: 0
From: Lost Wages, NV
Car: 1988 IROC
Engine: 305 TPI
Transmission: 5 speed
Axle/Gears: 3.08 Posi 10 Bolt w/ aluminum drums
Re: Tokico Illuminas and IROC springs?
where online/ mail-order can i find the Tokico's for purchase??
Joined: Aug 1999
Posts: 19,282
Likes: 103
From: Lawrence, KS
Car: Met. Silver 85 IROC/Sold
Engine: 350 HO Deluxe (350ci/330hp)
Transmission: T-5 (Non-WC)
Axle/Gears: Limited Slip 3.23's
Joined: Sep 2003
Posts: 25,895
Likes: 429
From: Pittsburgh PA
Car: 89 Iroc-z
Engine: 555 BBC Turbo
Transmission: TH400
Axle/Gears: MWC 9” 3.00
Re: Tokico Illuminas and IROC springs?
i got mine on ebay a long while ago for a great price brand new. It was like 410 bucks for 4 plus shipping. Alot better deal than i found in all the stores
Junior Member

Joined: Apr 2007
Posts: 27
Likes: 0
From: Deep South Texas
Car: 1991 RS
Engine: LO3 (305) / 4.8L LS
Transmission: T5
Axle/Gears: 4EU 3.27 Posi
Re: Tokico Illuminas and IROC springs?
Look on ebay for jdmwerks13...he sells just the shocks for 434.00 shipped.
http://cgi.ebay.com/ebaymotors/TOKIC...mZ150208249256
http://cgi.ebay.com/ebaymotors/TOKIC...mZ150208249256
Junior Member

Joined: Apr 2007
Posts: 27
Likes: 0
From: Deep South Texas
Car: 1991 RS
Engine: LO3 (305) / 4.8L LS
Transmission: T5
Axle/Gears: 4EU 3.27 Posi
Re: Tokico Illuminas and IROC springs?
I was just wondering why you used the Moog 5664 front springs....when I search summit racing it gives me a spring for a light duty truck like a jimmy and s10. I was wondering why the choice of that spring and not the Moog 5610, which the search pulls up for the Iroc?? I am also looking for the best springs for my car......after 17yrs and still on the stock struts/shock and springs...just researching before I buy.
Joined: Aug 1999
Posts: 19,282
Likes: 103
From: Lawrence, KS
Car: Met. Silver 85 IROC/Sold
Engine: 350 HO Deluxe (350ci/330hp)
Transmission: T-5 (Non-WC)
Axle/Gears: Limited Slip 3.23's
Re: Tokico Illuminas and IROC springs?
Thread Starter
Joined: Oct 2005
Posts: 520
Likes: 1
From: Fallston, Maryland
Car: 1989 Trans Am GTA
Engine: 350
Transmission: T56
Axle/Gears: 9 Bolt 3.70
Re: Tokico Illuminas and IROC springs?
I'm about to buy the Tokico struts. Do you think they'll be able to control the beefier IROC 5664 springs? I think I'll contact Tokico as well and see what they have to say. Thought I'd ask here too. Thanks.
Joined: Sep 2003
Posts: 25,895
Likes: 429
From: Pittsburgh PA
Car: 89 Iroc-z
Engine: 555 BBC Turbo
Transmission: TH400
Axle/Gears: MWC 9” 3.00
Re: Tokico Illuminas and IROC springs?
they should match well since they are adjustable. My Prokit front springs are like 700-750lb springs and the rears are progressive 170 i believe. Those are beefier than stock Irocz springs and my shocks have been great with this car
Thread Starter
Joined: Oct 2005
Posts: 520
Likes: 1
From: Fallston, Maryland
Car: 1989 Trans Am GTA
Engine: 350
Transmission: T56
Axle/Gears: 9 Bolt 3.70
Re: Tokico Illuminas and IROC springs?
That's exactly what I wanted to hear. Thanks!
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