Being from a redneck area, I'll be the first to admit I don't know how to properly pronounce the names of many aftermarket companies. So with your help, I'd like to make a list and eventually put it in the resource area.
5 Zigen -- gozigen
Aasco
AbFlug -- ab-floog
AC Schnitzer
ADVAN -- add-van
Akimoto -- ah-kee-mo-to
A'pexi -- apex
Arias -- ah-ree-us
Bilstein -- billsht-ine
Bipes
Blitz -- blits
Bomex -- boe-mex
Bride -- bridd
Carrillo -- ka-ree-oh (roll the r)
Cusco -- coos-co
Defi -- deaf-eye
Denso
Do Luck -- due-luck
Eibach -- i-bak
Enjo
Exedy -- x-edy, x-idy
Ferrea -- fuh-ray-uh
Fidanza -- feh-danza
Fluidyne -- fluid-ine
Fujitsubo -- foo-jeet-su-bo
GReddy -- gred-ee
Hayame -- Ha-ya-meh
Hotchkis -- hotch-kiss
Injen -- in-jen
Intrax -- in-trax
Jun -- joon
Kaaz
Kakimoto -- cock-ee-moe-toe
Kaminari -- ka-mi-nah-ree
Kaze -- ka-zae
Koyo -- ko-yo
Kuhmo -- Kum-ho
kyokugen -- keeyo-ku-gen (not like the gen in 'generation')
Lidatek
Lokar
Maido -- mah-ee-doh
Momo
Mugen -- moo-gen (soft g again)
Nismo
OS Giken
Pauter -- pout-er
PIAA -- pee-uh
Quaife
Rakuten -- rah-koo-ten
Recaro -- reck-car-roe
Rotora -- roe-toe-ruh
Samco
Seibon -- sigh-bone
Sparco -- spar-co
Spearco -- speer-co
Spoon
Tanabe -- tah-na-bee
Tein -- teh-een, ta-een
Tenzo
Tial -- tee-al
Tilton
Toda -- toe-da
Tokico -- toe-key-ko
Veilside -- vale-side
Volk -- volk
Wiseco -- whyse-co
Zeil
5 Zigen -- gozigen
Aasco
AbFlug -- ab-floog
AC Schnitzer
ADVAN -- add-van
Akimoto -- ah-kee-mo-to
A'pexi -- apex
Arias -- ah-ree-us
Bilstein -- billsht-ine
Bipes
Blitz -- blits
Bomex -- boe-mex
Bride -- bridd
Carrillo -- ka-ree-oh (roll the r)
Cusco -- coos-co
Defi -- deaf-eye
Denso
Do Luck -- due-luck
Eibach -- i-bak
Enjo
Exedy -- x-edy, x-idy
Ferrea -- fuh-ray-uh
Fidanza -- feh-danza
Fluidyne -- fluid-ine
Fujitsubo -- foo-jeet-su-bo
GReddy -- gred-ee
Hayame -- Ha-ya-meh
Hotchkis -- hotch-kiss
Injen -- in-jen
Intrax -- in-trax
Jun -- joon
Kaaz
Kakimoto -- cock-ee-moe-toe
Kaminari -- ka-mi-nah-ree
Kaze -- ka-zae
Koyo -- ko-yo
Kuhmo -- Kum-ho
kyokugen -- keeyo-ku-gen (not like the gen in 'generation')
Lidatek
Lokar
Maido -- mah-ee-doh
Momo
Mugen -- moo-gen (soft g again)
Nismo
OS Giken
Pauter -- pout-er
PIAA -- pee-uh
Quaife
Rakuten -- rah-koo-ten
Recaro -- reck-car-roe
Rotora -- roe-toe-ruh
Samco
Seibon -- sigh-bone
Sparco -- spar-co
Spearco -- speer-co
Spoon
Tanabe -- tah-na-bee
Tein -- teh-een, ta-een
Tenzo
Tial -- tee-al
Tilton
Toda -- toe-da
Tokico -- toe-key-ko
Veilside -- vale-side
Volk -- volk
Wiseco -- whyse-co
Zeil