| US SEAL INC | VALVE | EXHAUST | |||||||||||
| liter | cu.in | cc | engine | years | head | cyl | # val | model | stem | g/od | SEAL | SEAL | |
| FO | FORD | ||||||||||||
| FO | 1.3L | 080 | 1324 | vin h, k "mazda b3" | 1988-97 | sohc | L4 | 8V | aspire, festiva | .276 | .474 | VS435 | |
| FO | 1.6L | 098 | 1598 | vin 6, z | 1991-94 | dohc | L4 | 16V | capri, tracer | .237 | .435 | VS438 | |
| FO | 1.6L | 097 | 1598 | vin 5, "mazda b6" | 1987-89 | sohc | L4 | 8V | tracer | .276 | .474 | VS435 | |
| FO | 1.8L | 112 | 1839 | vin 8, "mazda bp" | 1991-96 | dohc | L4 | 16V | tracer/escort | .237 | .436 | VS438 | |
| FO | 1.9L | 116 | vin9, j "USA" | 1985-96 | sohc | L4 | 8V | cfi | .317 | .472 | VS423 | ||
| FO | 1.9L | 116 | vin9, j "MEXICO" | 1985-96 | sohc | L4 | 8V | cfi | .317 | .472 | VS423 | ||
| FO | 2.0L | 121 | 1991 | vin a, "mazda fs" | 1993-97 | dohc | L4 | 16V | probe | .237 | .436 | VS438 | |
| FO | 2.0L | 121 | vin n, "duratec" | 2005-09 | dohc | L4 | 16V | focus | .217 | .435 | VSF23 | ||
| FO | 2.0L | 122 | 1998 | vin 3,b, z "zetec" | 1995-04 | dohc | L4 | 16V | auto,truck | .236 | .474 | VSF20 | |
| FO | 2.0L | 122 | vin p, | 1997-04 | sohc | L4 | 8V | escort, focus,tracer | .317 | .472 | VS423 | ||
| FO | 2.0L | 122 | vin c | 1983-88 | sohc | L4 | 8V | truck | VS104 | ||||
| FO | 2.2L | 133 | 2184 | vin c, L, "mazda f2" | 1989-92 | sohc | L4 | 12V | probe, gt | .276 | .476 | VS435 | |
| FO | 2.3L | 140 | vin a,t,w,y | 1974-85 | sohc | L4 | 8V | auto | .344 | .502 | FOSB | see below | |
| FO | 2.3L | 140 | vin a,t,w,y | 1983-88 | sohc | L4 | 8V | auto | .344 | .502 | FOSB | ||
| FO | 2.3L | 140 | vin s,x, "hsc" | 1985-94 | ohv | L4 | 8V | tempo, topaz | .344 | .502 | FOSB | ||
| FO | 2.3L | 140 | vin a, m | 1987-93 | sohc | L4 | 8V | mustang | .344 | .502 | FOSB | ||
| FO | 2.3L | 140 | vin a | 1995-97 | sohc | L4 | 8V | truck | .344 | .502 | FOSB | ||
| FO | 2.3L | 140 | vin a | 1985-94 | sohc | L4 | 8V | truck | .344 | .502 | FOSB | ||
| FO | 2.3L | 140 | vin z, "duratec" | 2004-09 | dohc | L4 | 16V | focus,fusion,milan | VSF23 | ||||
| FO | 2.3L | 140 | vin d, z, "duratec" | 2001-09 | dohc | L4 | 16V | truck | VSF23 | ||||
| FO | 2.5L | 152 | 2497 | vin b, "mazda kL" | 1993-97 | dohc | V6 | 12V | probe | .237 | .436 | VS438 | |
| FO | 2.5L | 153 | vin c | 1998-01 | sohc | L4 | 8V | truck | .276 | .495 | VS309 | ||
| FO | 2.5L | 153 | vin d, "hsc" | 1986-91 | ohv | L4 | 8V | sable, taurus | .344 | .502 | FOSB | ||
| FO | 2.5L | 155 | vin g,L "duratec" | 1995-02 | dohc | V6 | 24V | contour,cougar,mystique | .236 | .495 | VSF25 | ||
| FO | 2.8L | 171 | vin s | 1983-86 | ohv | V6 | 12V | pass/truck | .317 | .502 | VS408 | ||
| FO | 2.9L | 177 | vin t | 1986-92 | ohv | V6 | 12V | truck | .317 | .502 | VS290 | alternative | |
| FO | 3.0L | 182 | 2970 | vin 1,w "nissan vg30e" | 1993-98 | sohc | V6 | 12V | villager | .276 | .434 | VS503 | VS442 |
| FO | 3.0L | 182 | vin y, "yamaha sho" | 1989-95 | dohc | V6 | 24V | taurus sho | .237 | .436 | |||
| FO | 3.0L | 182 | vin 1,s "duratec" | 2000-06 | dohc | V6 | 24V | Lincoln vin "s" | .236 | .495 | VSF25 | ||
| FO | 3.0L | 182 | vin 1, s "duratec" | 1996-09 | dohc | V6 | 24V | pass/van | .236 | .495 | VSF25 | ||
| FO | 3.0L | 182 | vin 1, g "duratec" | 2001-09 | dohc | V6 | 24V | truck | .236 | .495 | VSF25 | ||
| FO | 3.0L | 182 | vin 1,2,u | 2000-08 | ohv | V6 | 12V | auto,truck | .276 | .500 | VSF30L | ||
| FO | 3.0L | 182 | vin 1,2,u | 1986-99 | ohv | V6 | 12V | auto,truck | .315 | .530 | VSF30 | ||
| FO | 3.2L | 195 | vin p, "yamaha sho" | 1993-95 | dohc | V6 | 24V | taurus sho | .237 | .436 | |||
| FO | 3.3L | 199 | 3275 | vin t, "nissan vg33e" | 1999-02 | sohc | V6 | 12V | van,truck | .276 | .434 | VS503L | VS442 |
| FO | 3.5L | 213 | vin t,w "duratec" | 2007-09 | dohc | V6 | 24V | sable, taurus, truck | TBA | ||||
| FO | 3.7L | 227 | vin r "duratec" | 2009 | dohc | V6 | 24V | mks | |||||
| FO | 3.8L | 232 | vin 3,4,r | 2000-04 | ohv | V6 | 12V | auto | .276 | .495 | VSF24 | ||
| FO | 3.8L | 232 | vin 4 | 1996-03 | ohv | V6 | 12V | truck | .276 | .495 | VSF24 | ||
| FO | 3.8L | 232 | vin 3,4,r | 1996-99 | ohv | V6 | 12V | auto | .276 | .495 | VS309 | ||
| FO | 3.8L | 232 | vin 3,4,r | 1989-95 | ohv | V6 | 12V | auto | .344 | .499 | VS108 | ||
| FO | 3.8L | 232 | vin 3,4,r | 1984-88 | ohv | V6 | 12V | auto | .344 | .499 | VS104 | ||
| FO | 3.9L | 238 | vin 6 | 2004-07 | ohv | V6 | 12V | truck | .276 | .495 | VSF24L | ||
| FO | 3.9L | 242 | vin a | 2000-06 | dohc | V8 | 32V | lincoln, thunderbird | .197 | VSF39 | |||
| FO | 4.0L | 245 | vin n | 2005-09 | sohc | V6 | 12V | mustang | .276 | .472 | VS292 | ||
| FO | 4.0L | 244 | 4015 | vin x | 1990-01 | ohv | V6 | 12V | truck | .315 | .472 | VS290 | alternative |
| FO | 4.0L | 244 | 4015 | vin e,k | 1997-09 | sohc | V6 | 12V | truck | .276 | .472 | VS292 | |
| FO | 4.2L | 256 | vin 2 | 1999-08 | ohv | V6 | 12V | truck | .276 | .495 | VSF24L | ||
| FO | 4.2L | 256 | vin 2 | 1997-98 | ohv | V6 | 12V | truck | .276 | .495 | VS309 | ||
| FO | 4.6L | 281 | vin 8, gas only | 2006-09 | sohc | V8 | 24V | explorer,mountaineer | .237 | .436 | VSF54 | ||
| FO | 4.6L | 281 | vin 6,9,v,w | 2000-09 | sohc | V8 | 16V | auto,truck | .276 | .495 | VS775 | ||
| FO | 4.6L | 281 | vin 6,9,v,w | 1994-99 | sohc | V8 | 16V | auto,truck | .276 | .495 | VS775 | ||
| FO | 4.6L | 281 | vin 6,9,v,w | 1992-93 | sohc | V8 | 16V | auto | .276 | .445 | VS110 | ||
| FO | 4.6L | 281 | vin x | 1999-04 | sohc | V8 | 16V | mustang gt | .276 | .495 | VS775 | ||
| FO | 4.6L | 281 | vin x | 1996-98 | sohc | V8 | 16V | mustang gt | .276 | .495 | VS775 | ||
| FO | 4.6L | 281 | vin r,v "intech" | 1993-04 | dohc | V8 | 32V | auto | .276 | .495 | VSF46 | ||
| FO | 4.6L | 281 | vin h | 2003-05 | dohc | V8 | 32V | aviator | .276 | .495 | VSF46 | ||
| FO | 4.6L | 281 | vin h | 2005-09 | sohc | V8 | 24V | mustang,shelby,bullitt | .237 | .436 | VSF54 | ||
| FO | 4.7L | 289 | vin c,n | 1966-68 | V8 | 16V | auto,truck | .344 | .502 | FOSB | see below | ||
| FO | 4.7L | 289 | vin c,n | 1964-65 | V8 | 16V | auto,truck | .344 | .502 | FOSB | |||
| FO | 4.9L | 300 | "heavy duty" | 1965-79 | ohv | L6 | 12V | truck | .344 | .502 | VS304X | ||
| FO | 4.9L | 300 | "light duty", vin y | 1987-96 | ohv | L6 | 12V | truck | .344 | .502 | FOSB | ||
| FO | 4.9L | 300 | vin z, "Lpg" | 1994-96 | ohv | L6 | 12V | truck | .344 | .502 | FOSB | ||
| FO | 5.0L | 302 | vin f | 1968-69 | ohv | V8 | auto,truck | .344 | .502 | FOSB | |||
| FO | 5.0L | 302 | vin f | 1969-78 | ohv | V8 | auto,truck | .344 | .502 | FOSB | see below | ||
| FO | 5.0L | 302 | vin f | 1978-85 | ohv | V8 | auto,truck | .344 | .502 | FOSB | |||
| FO | 5.0L | 302 | vin e,f,t | 1982-95 | ohv | V8 | 16V | auto | .344 | .502 | FOSB | ||
| FO | 5.0L | 302 | vin e,f,t | 1986-91 | ohv | V8 | 16V | auto | .344 | .502 | FOSB | ||
| FO | 5.0L | 302 | vin e,f,t | 1993-95 | ohv | V8 | 16V | mustang | .344 | .502 | FOSB | ||
| FO | 5.0L | 302 | vin n,p | 1986-01 | ohv | V8 | 16V | all truck, except 1996 explorer | .344 | .502 | FOSB | ||
| FO | 5.4L | 330 | vin s "supercharged" | 2005-09 | dohc | V8 | 32V | mustang shelby | .276 | .495 | VS775 | ||
| FO | 5.4L | 330 | vin L,m,z "triton" | 2000-09 | sohc | V8 | 16V | truck | .276 | .495 | VS775 | ||
| FO | 5.4L | 330 | vin L,m,z "triton" | 1997-99 | sohc | V8 | 16V | truck | .276 | .495 | VS775 | ||
| FO | 5.4L | 330 | vin 5, v "triton" | 2004-09 | sohc | V8 | 24V | all truck-except f150 unleaded fuel only | .237 | .436 | VSF54 | ||
| FO | 5.4L | 330 | vin 5, v "triton" | 2004-09 | sohc | V8 | 24V | f150- unleaded fuel only | .237 | .436 | VSF54 | ||
| FO | 5.4L | 330 | vin a,r "intech" | 1999-04 | dohc | V8 | 32V | truck | .276 | .495 | VSF46 | ||
| FO | 5.8L | 351 | vin h, "windsor" | 1988-97 | ohv | V8 | 16V | truck | .344 | .502 | FOSB | see below | |
| FO | 6.0L | 363 | vin p "navistar" | 2003-09 | ohv | V8 | 32V | diesel truck | .276 | .440 | VSF60 | ||
| FO | 6.1L | 370 | vin a, h | 1986-91 | ohv | V8 | 16V | truck | .374 | .502 | VS267 | ||
| FO | 6.6L | 401 | "brazilian turbo diesel | 1986-94 | ohv | L6 | 12V | truck-direct injection | .373 | .627 | VS403 | ||
| FO | 6.8L | 415 | vin s, "triton" | 2000-09 | sohc | V10 | 20V | truck | .276 | .495 | VS775 | ||
| FO | 6.8L | 415 | vin s, "triton" | 1997-99 | sohc | V10 | 20V | truck | .276 | .495 | VS775 | ||
| FO | 6.8L | 415 | vin y, "triton" | 2005-09 | sohc | V10 | 30V | heavy duty truck | .237 | .436 | VSF54 | ||
| FO | 6.9L | 421 | vin 1, "navistar" | 1983-87 | ohv | V8 | 16V | diesel truck | .374 | .627 | VS690 | ||
| FO | 7.0L | 429 | vin 8, j "medium duty" | 1991-98 | ohv | V8 | 16V | LPG | .344 | .562 | VS305 | ||
| FO | 7.0L | 429 | vin c,k "medium duty" | 1979-91 | ohv | V8 | 16V | truck | .373 | .502 | VS381 | ||
| FO | 7.3L | 445 | vin f. "navistar" | 1994-03 | ohv | V8 | 16V | direct injection | .315 | .565 | VSF73 | ||
| FO | 7.3L | 445 | vin c,k, "navistar" | 1993-94 | ohv | V8 | 16v | indirect injection | .375 | .625 | VS690 | ||
| FO | 7.3L | 445 | vin m, "navistar" | 1988-95 | ohv | V8 | 16V | truck | .375 | .625 | VS690 | ||
| FO | 7.5L | 460 | vin a,j,L | 1973-87 | ohv | V8 | 16V | truck | .344 | .502 | VS296P | ||
| FO | 7.5L | 460 | vin g | 1992-97 | ohv | V8 | 16V | truck | .343 | .562 | VS305 | ||
| FO | 7.5L | 460 | vin g | 1988-92 | ohv | V8 | 16V | truck | .343 | .625 | VS400 | ||
| FO | 7.5L | 460 | vin g | 1988-97 | ohv | V8 | 16V | truck | .344 | .502 | VS400 | ||
| FO | 7.8L | 473 | vin a "braziliann" | 1987-94 | ohv | L6 | 12V | truck | .373 | .625 | VS403 |
| FOSB | FOSB | FOSB | FOSB |
| Positive | Valve stem seals | ||
| Valve | guide | style | |
| US Seal# | diameter | o.d. | |
| vs-133 | 11/32 | na | o-ring |
| vs-104 | 11/32 | .500 | rubber-ring & band |
| vs-304x | 11/32 | .500 | rubber- 2 ring |
| vs-305 | 11/32 | .530 / .562 | rubber-ring & band |
| vs-408a | 11/32 | .530 | rubber- 2 ring |
| vs-562r | 11/32 | .562 | metal clad |
| vs-400 | 11/32 | .625 | rubber-ring & band |
| vs-402 | 3/8 | .625 | rubber-ring & band |
| FOSB | FOSB | FOSB | FOSB |
| Umbrella | Valve stem seals | ||
| Valve | |||
| US Seal# | diameter | ||
| vs-381 | 11/32 | ||
| vs-383 | 11/32 | ||
| vs-448 | 11/32 | ||
| vs-449 | 11/32 | ||
| vs-267 | 3/8 |
