Amazon.com: 4 x Pioneer TS Series 350W Max 6" x 8" A-SERIES 4-Way Coaxial Car Speakers with Gravity Magnet Phone Holder Bundle (4 Speakers) : Electronics
MAXXSONICS 250W Full Range 2 Way Coaxial Car Audio 5x7 by 6x8" Speaker (12 Pack) 6 x CS-5768CX - The Home Depot
Install Bay AW-668SP 6x8" Dual Cone Speaker with 5x7" Adapters, Sold each - Walmart.com
2005-2012 Kicker Audio 6x8 Speakers
4pcs FORD 6x9 5x7 6x8 to 5.25" 6.5" Car Speaker Adapter Plate With Wir – absoluteusa
Custom Made 6x8 to 6.5" Speaker Adapter (Fits Select Ford Vehicles) – Sounds Good Stereo Online
KICKER | KS Series 6x8" Coax
JBL GX Series 6" x 8" / 5" x 7" 2-Way Coaxial Car Loudspeakers with Polypropylene Cones (Pair) Black GX8628 - Best Buy
6x8" Speaker Baffles Oval 2 Pack Boom Mat Design Engineering DEI 05037 – Robidoux Inc
Scosche HD57684 5" x 7" & 6" x 8" Speaker Set for Cars