Act 1 : Project D
Manuel - Let's Go, Come On (4th Stage D Selection, SEB 149, SEB 150, SEB Super GT 2005, Tokyo Auto Salon Presents Evolution #01)
Act 2 : Full Speed! Downhill Battle
Digital Planet - We'll See Heaven (SEB 145, JGTC 2004 Round 1, 4th Stage D Selection, SEB 150)
Fastway - Go Beat Crazy (JGTC 2004 Round 2, 4th Stage D Selection)
Act 3 : The Top Gun of the Toudou School
Spock - The Fire's On Me (4th Stage D Selection)
Act 4 : The Two Pieces of Advice
D-Team - Speed Car (4th Stage D Selection)
Fastway - Revolution (4th Stage D Selection)
Act 5 : The Starting Line to Victory
Dino Starr - Give Me Your Love (4th Stage D Selection)
SylverR - Night Trip (4th Stage D Selection)
Act 6 : Blind Attack
Maiko - Don't Go Baby (4th Stage D Selection)
Lia - All Around (4th Stage D Selection)
Nutty - Secret Love (4th Stage D Selection)
Symbol - Forever Young (SEB 145, JGTC 2004 Round 1, 4th Stage D Selection)
Lia - Sky High (4th Stage D Selection)
Act 7 : The 85's Thunderous Turbo
Mega NRG Man - Supersonic Lady (SEB 157, 4th Stage D Selection 2)
Dusty - Midnight Lover (SEB 157, 4th Stage D Selection2)
Act 8 : Fate's FD Battle
Digital Planet - Fly Away (SEB 151, SEB Super GT 2005, Tokyo Auto Salon Presents Evolution #01, 4th Stage D Selection2)
Dark Angels - Right Now (SEB 147)
Act 9 : Kyoko's Confession
Ace - Power of Sound (SEB 15
Act 10 : Saitama Area Ultimate Weapon
Jean Love - Steel Blade (SEB 147, JGTC 2004 Round 2, 4th Stage D Selection 2)
Act 11 : Downhill Battle in the Rain
Ace - Tokyo Lights *
Ace - Drivin' Crazy (4th Stage D Selection 2)
Fastway - Raising Hell (4th Stage D Selection 2)
Jean Love - Movin' Up Moving Now (SEB 148, JGTC 2004 Round 2, 4th Stage D Selection 2)
Manuel - On My Wings (Initial D Best Song Collection 1998-2004, 4th Stage D Selection 2)
Brian Ice - I Believe In Lovin' You (SEB 159, 4th Stage D Selection 2)
Manuel - What You Need (SEB 158, 4th Stage D Selection 2)
Act 13 : Motivation
Dave Rodgers - Wild Reputation 2005 (SEB 156, 4th Stage D Selection 2)
Chris T. - I Wanna be the Night (SEB 145, 4th Stage D Selection 2)
Act 14 : The Pitiful Lonely Driver
Maiko - Get the Future *
Act 15 : 4WD Complex
Manuel - No Control*
Act 16 : The Hillclimb of Fury
Powerful T. - Blood And Fire (SEB 14
Fastway - Kingo King'O Beat (SEB 15
Norma Sheffield - I Just Wanna Call You Now*
Act 17 : Saitama Area Final Battle
Nick Mansell - Mission Impossible*
Karen - Fly In The Sky*
Act 18 : Last Drive
SaGa - Madoka*
Act 19
Matt Land - City Lover City Rider*
Act 20
Neo - Go Go Money (Friday Night Ver.)*
Pamsy - So Fragile*
Mega NRG Man - Back On The Rocks (SEB 77, Initial D 1st Stage D Selection)
Above are the respective tracks from the respective episodes. Don't PM me, I don't have the tracks.
Ok, I was lying, I really don't have the tracks. 
