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Directory Topics Posts Last Post
Common Room
General discussion, SyTy related or not. Most of these types of conversations are more fit for Facebook at this point, but we didn't want to eliminate this section completely.
Topics: 37 Posts: 156
37 156
The proving grounds of SyTy racing. Drag strip, autoX, standing mile and street action.
Topics: 5 Posts: 7
Last Post: Bench Racing
5 7
Bench Racing
Restorations, modifications, or just the joys of ownership...start a diary thread on your truck(s)!
Topics: 13 Posts: 67
Last Post: Syclone #136
13 67
Syclone #136
ISTR news and updates regarding the forum. Post your issues or problems here.
Topics: 10 Posts: 11
10 11
ISTR Financial Reporting
by sytyguy
This is a redirect to the ISTR OT on Facebook. If you are not on Facebook, anything you would normally post here may be posted in SyTySoGT Chat above.
Topics: 0 Posts: 0
0 0
Information & Historical Data
SyTySoGT related articles, news feeds, print media, TV appearance, and videos recently published.
Topics: 15 Posts: 16
15 16
From part numbers to fluid info, your guide to SyTySoGT ownership.
Topics: 6 Posts: 10
6 10
Stock Engine Specifications
by SYO237
Learn about PAS, prototypes, and the history leading up to and during the production of the sportmachine trucks.
Topics: 10 Posts: 12
10 12
SyTySoGT Tech
SyTySoGT related how-to articles from modifications to fixing common issues. Sponsored by:
Topics: 7 Posts: 8
7 8
Topics: 21 Posts: 64
21 64
Topics: 8 Posts: 17
8 17
Topics: 11 Posts: 19
Last Post: software
11 19
Topics: 1 Posts: 1
1 1
DuPont Interior Trim Paint Codes
by SYO237
Topics: 3 Posts: 15
3 15
Typhoon glass handle removal?
by S678
SyTySoGT LS Conversion discussion.
Topics: 3 Posts: 50
3 50
Ls Swap Single Turbo Build
SyTySoGT Events
2017 Carlisle Truck Nationals August 5th - 7th Carlisle, PA
Topics: 11 Posts: 52
11 52
2018 Carlisle Truck Nationals August 3rd - 5th Carlisle, PA
Topics: 6 Posts: 12
Last Post: 2018 roster
6 12
2018 roster
by SY-1193
Topics: 21 Posts: 54
Last Post: FL Miami Meet 2018
21 54
FL Miami Meet 2018
by SYO237
Topics: 27 Posts: 47
Last Post: 92 Ty 4sale
27 47
92 Ty 4sale
by Static
Powered by:
Topics: 3 Posts: 4
3 4
Vendors Row
Topics: 6 Posts: 14
6 14
BRUTUS: The new shop Typhoon
by SVO
Topics: 0 Posts: 0
0 0
Topics: 1 Posts: 1
Last Post: Bumper bracket
1 1
Bumper bracket
by SyRob

Welcome to the ISTR Forums!


The International Syclone Typhoon Registry is an organization that is focused on the accurate history, preservation, technical information and data collection of the 1991-93 GMC Syclone, Typhoon, & Sonoma GT sportmachine trucks.

Please consider becoming an ISTR member to gain access to REALLY cool stuff, get entered into members only raffles, and to get discounts from our vendors!

ISTR Instagram Feed


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Upcoming Events


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What's Going On


There are currently 6 users online. 1 members and 5 guests.

Most users ever online was 121 at 12:18 PM on 05-05-2017.

ISTR Forum Stats


Topics: 285   Posts: 720   Members: 256   Active Members: 30
Welcome to our newest member, Syty288.