The Porsche 981 and 718 Caymans are incredibly popular track cars. One issue these cars tend to have on track is overheating and going into limp mode. Porsche helped resolve this issue on the GT4/RS with a larger center radiator with ducting/venting to improve air flow. Upgrading to the larger GT4 Radiator is a huge improvement and can be done with factory parts with no modifications necessary. CSF friend and media partner Dustin Williams recently performed the GT4 Radiator Conversion on his Cayman GTS. He was kind enough to share the parts needed to complete this conversion.
981 GT4 Radiator Conversion
Parts List
The following list of parts are all required to mount the GT4 Center Radiator (use CSF #7068). You will still need a GT4 or GT4RS Front Bumper Cover and related trim/mounting pieces. Companies like Pelican Parts sell conversion kits for the 981, just be sure to find one that uses an OE bumper and parts.
| Product Description | Part # | Quantity |
|---|---|---|
| CSF GT4 Center Radiator | CSF #7068 | 1 |
| Upper Duct | 991-504-489-90-1E0 | 1 |
| Support Frame | 991-504-487-91-1E0 | 1 |
| Air Duct | 981-575-141-80-1E0 | 1 |
| Radiator Outer Support | 991-106-338-01 | 1 |
| Radiator Lower Mount | 991-106-538-02 | 2 |
| Radiator Upper Mount | 901-106-537-0 | 2 |
| Water Hose | 981-106-638-90 | 1 |
| Water Hose | 981-106-639-90 | 1 |
| Hexagon Nut | PAF-108-333 | 4 |
| Inner Support Retainer | 991-504-587-90 | 2 |
| A/C Condenser Mount Bolt | 999-919-133-09 | 2 |
| AC Line | 981-573-103-8 | 1 |
| A/C Refrigerant Liquid Hose | 981-573-105-81 | 1 |
| Support | 991-573-841-0 | 1 |
Installation
With all the parts being bolt-in and plug & play, the GT4 Radiator Conversion very straight forward. Check out Dustin Williams’ videos on the installation.
982/718 GT4/GT4 RS Radiator Conversion
Parts List
The following list of parts are all required to mount the GT4 / GT4 RS Center Radiator (use CSF #7068). You will need a GT4 or GT4RS Front Bumper Cover and related trim/mounting pieces (complete list below). This conversion has not been verified and may be missing some minor components and hardware.
GT4 / GT4 RS Center Radiator Conversion
Table 1
| Ref# | Product Description | Part # | Qty |
|---|---|---|---|
|
1 |
GT4 Center Radiator |
CSF #7068 |
1 |
|
2 |
Coolant hose right |
991 106 648 91 |
1 |
|
3 |
Coolant hose left |
991 106 649 91 |
1 |
|
4 |
Sealing frame |
991 106 338 01 |
1 |
|
5 |
Rubber bushing (upper) |
991 106 537 01 |
2 |
|
6 |
Rubber bushing (lower) |
991 106 538 03 |
2 |
|
7 |
Air Guide |
See – Table 2 |
– |
Table 2
| Ref# | Product Description | Part # | Qty |
|---|---|---|---|
|
1 |
Air guide center |
982 121 291 C |
1 |
|
2 |
Air guide front center |
982 121 673 B |
1 |
|
3 |
Air guide rear center |
982 121 674 B |
1 |
|
4 | Air guide side left | 982 121 333 D | 1 |
4 | Air guide side right | 982 121 334 D | 1 |
|
5 |
bearing pin (for Radiator mounting) |
991 504 587 90 |
2 |
Table 3
| Ref# | Product Description | Part # | Qty |
|---|---|---|---|
|
1 |
Pressure line |
991 573 105 83 |
1 |
|
2 |
Pressure line Condenser |
991 573 103 84 |
1 |
|
3 |
bracket for refrigerant pipe |
971 260 197 |
2 |
|
4 |
bracket for refrigerant pipe |
9P1 816 765 |
1 |
|
5 |
Hose bracket |
999 507 969 40 |
1 |
|
6 |
Socket head bolt with hexagon socket head (M8X28) |
N 104 144 02 |
4 |
|
7 |
O-ring |
955 573 749 01 |
4 |
|
8 |
A/C condenser (not required) |
9P1 820 411 |
2 |
GT4 Bumper Conversion
| Ref# | Product Description | Part # | Qty |
|---|---|---|---|
|
1 |
GT4 Bumper cover (with headlamp washers) |
982 898 041 J |
1 |
|
1 |
GT4 Bumper cover (without headlamp washers) |
982 898 041 H |
1 |
|
2 |
Tow hitch |
982 807 499 A |
1 |
|
3 |
Spoiler front |
982 807 543 L |
1 |
|
4 |
Spoiler side, left |
982 807 513 |
1 |
|
4 |
Spoiler side, right |
982 807 514 |
1 |
|
5 |
Adhesive tape |
000 043 985 00 |
1 |
|
6 |
Underbody Cover |
982 807 587 |
1 |
|
7 |
Bracket Cover left |
982 807 055 |
1 |
|
7 |
Bracket Cover right |
982 807 056 |
1 |
|
8 |
panel screw |
999 073 261 09 |
12 |
|
9 |
panel screw |
9A7 007 517 00 |
4 |
|
10 |
clamping nut / Speed nut (ST4.8X22X18) |
912 425 01 |
15 |
|
11 |
Fixing Trim (front) |
992 807 891 |
2 |
|
12 |
Assembly kit (Licence plate holder) – Optional |
982 807 813 P |
1 |
|
13 |
Assembly kit (Licence plate holder) – Optional |
982 807 813 Q |
1 |
|
14 |
Assembly kit (Licence plate holder) – Optional |
982 807 813 S |
1 |
|
14 |
Assembly kit (Licence plate holder) – Optional |
982 807 813 R |
1 |
|
15 |
Sensor module – Outside temperature indicator |
958 505 535 00 |
1 |
|
16 |
Air guide left |
982 807 605 |
1 |
|
16 |
Air guide right |
982 807 606 |
1 |
|
17 |
Grille center (upper) |
982 807 680 B |
1 |
|
18 |
Grille center (lower) |
982 807 681 E |
1 |
|
19 |
Grille side left |
982 807 683 C |
1 |
|
19 |
Grille side right |
982 807 684 C |
1 |
|
20 |
Trim Air guide left |
982 807 881 |
1 |
|
20 |
Trim Air guide right |
982 807 882 B |
1 |
|
21 |
Foam part Bumper carrier (sold with impact bar) |
982 807 231 A |
1 |
|
21 |
Foam part Bumper carrier (sold without impact bar) |
982 807 231 B |
1 |
|
22 |
adhesive |
PAH 071 781 00 |
1 |
|
23 |
emulsion tube |
9Y0 130 085 |
1 |
|
24 |
Round/Oval-head screw (TP6X20-Q) |
104 734 02 |
14 |
|
25 |
Bracket Front lights left |
982 807 005 |
1 |
|
25 |
Bracket Front lights right |
982 807 006 |
1 |
|
26 |
Pop rivet (3,2X17,15) |
PAF 005 217 |
6 |
GT4 RS Bumper Conversion
| Ref # | Product Description | Part # | Quantity |
|---|---|---|---|
|
1 |
GT4 RS Bumper cover |
982 898 041 M |
1 |
|
2 |
Tow hitch |
982 807 499 A |
1 |
|
3 |
Spoiler (Includes Front, Left, and Right) – 4 & 5 |
982 807 543 E |
1 |
|
4 |
Spoiler front (part of 3) |
982 807 541 D |
1 |
|
5 |
Spoiler side, left (part of 3) |
982 807 749 |
1 |
|
5 |
Spoiler side, right (part of 3) |
982 807 750 |
1 |
|
6 |
Side Spoiler left |
982 807 100 AY |
1 |
|
6 |
Side Spoiler right |
982 807 544 AY |
1 |
|
7 |
Securing plate left |
982 807 787 |
1 |
|
7 |
Securing plate right |
982 807 788 |
1 |
|
8 |
Air guide left |
982 807 605 |
1 |
|
8 |
Air guide right |
982 807 606 |
1 |
|
9 |
Grille center (upper) |
982 807 680 B |
1 |
|
10 |
Grille center (lower) |
982 807 681 E |
1 |
|
11 |
Grille side left |
982 807 683 C |
1 |
|
11 |
Grille side right |
982 807 684 C |
1 |
|
12 |
Trim Air guide left |
982 807 881 A |
1 |
|
12 |
Trim Air guide right |
982 807 882 B |
1 |
|
13 |
Cover Underbody |
982 807 587 D |
1 |
|
14 |
Foam part Bumper carrier (sold with impact bar) |
982 807 231 A |
1 |
|
14 |
Foam part Bumper carrier (sold without impact bar) |
982 807 231 B |
1 |
|
15 |
Bracket Front lights left |
982 807 005 |
1 |
|
15 |
Bracket Front lights right |
982 807 006 |
1 |
|
16 |
Fixing Trim front |
992 807 891 |
1 |
|
16 |
Air guide right |
982 807 606 |
1 |
|
17 |
Assembly kit (Licence plate holder) – Optional – Europe |
982 807 813 P |
1 |
|
18 |
Assembly kit (Licence plate holder) – Optional – USA, Canada, Mexico |
982 807 813 Q |
1 |
|
19 |
Assembly kit (Licence plate holder) – Optional – All other countries, not USA, Canada, Mexico |
982 807 813 S |
1 |
|
19 |
Assembly kit (Licence plate holder) – Optional – Japan |
982 807 813 S |
1 |
|
20 |
Assembly kit (Licence plate holder) – Optional – China/Mercosur |
982 807 813 T |
1 |
|
21 |
Round/Oval-head screw (TP6X20-Q) |
104 734 02 |
14 |
|
22 |
Pop rivet (3,2X17,15) |
PAF 005 217 |
6 |
|
23 |
Clip |
PAF 006 122 |
6 |
|
24 |
clamping nut (ST4.8X22X18) |
912 425 01 |
14 |
|
25 |
Panel screw (ST4,8X19-C) |
9A7 007 517 00 |
6 |
|
26 |
Double-sided adhesive tape |
982 807 850 C |
1 |
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