Engine Mechanical Topics Discussion for motor builds, cams, head work, stripped bolts and other engine related issues. The good and the bad. If it goes round and around or up and down, post it here.

Twin cam interchangeable heads?

Thread Tools
 
Search this Thread
 
Old Mar 8, 2021 | 10:35 PM
  #1  
REW13's Avatar
REW13
Thread Starter
|
Seasoned HDF Member
5 Year Member
Liked
Loved
Community Favorite
Joined: Nov 2016
Posts: 5,801
Likes: 809
From: South Carolina
Default Twin cam interchangeable heads?

What are years where they are interchangeable?
99 to?
 
Reply
Old Mar 10, 2021 | 05:54 AM
  #2  
prodrag1320's Avatar
prodrag1320
Banned
Joined: Sep 2009
Posts: 3,569
Likes: 624
From: deland,florida
Default

Originally Posted by REW13
What are years where they are interchangeable?
99 to?
any TC head will fit on any TC motor,if using late heads on a early motor (or visa versa) the intake flanges will need to be changed,but that all
 
Reply
Old Mar 10, 2021 | 05:26 PM
  #3  
REW13's Avatar
REW13
Thread Starter
|
Seasoned HDF Member
5 Year Member
Liked
Loved
Community Favorite
Joined: Nov 2016
Posts: 5,801
Likes: 809
From: South Carolina
Default

Cool... Thank you for your response
Saw a set of 06 heads but wondered if they would fit my 01
 
Reply
Old Mar 12, 2021 | 10:35 AM
  #4  
billgran's Avatar
billgran
Tourer
Veteran: Army
Joined: May 2006
Posts: 269
Likes: 100
From: Florida
Default

REW13,
I have a set of '02-'03 Twin Cam heads for sale. PM me if interested, cylinders too if you need them
 
Reply
Old Mar 12, 2021 | 02:15 PM
  #5  
roussfam's Avatar
roussfam
Seasoned HDF Member
15 Year Member
Top Answer: 1
Top Answer: 3
Top Answer: 5
Joined: Jan 2009
Posts: 12,689
Likes: 8,295
From: Ottawa, Ontario
Default

Originally Posted by REW13
Cool... Thank you for your response
Saw a set of 06 heads but wondered if they would fit my 01
06 and up heads will flow a little better and they came with beehive valve springs so they can accommodate higher lift cams. If you can score some 103 heads with ACR's, even better.

Jim
 
Reply
Old Mar 12, 2021 | 05:55 PM
  #6  
REW13's Avatar
REW13
Thread Starter
|
Seasoned HDF Member
5 Year Member
Liked
Loved
Community Favorite
Joined: Nov 2016
Posts: 5,801
Likes: 809
From: South Carolina
Default

Sweet thank you for the information Mr Jim... Just want breathe a little bit more
 
Reply
Old Mar 13, 2021 | 07:25 AM
  #7  
prodrag1320's Avatar
prodrag1320
Banned
Joined: Sep 2009
Posts: 3,569
Likes: 624
From: deland,florida
Default

The 06 will be a nice improvement,just dont forget to use the late flanges
 
Reply
Old Mar 13, 2021 | 09:32 AM
  #8  
REW13's Avatar
REW13
Thread Starter
|
Seasoned HDF Member
5 Year Member
Liked
Loved
Community Favorite
Joined: Nov 2016
Posts: 5,801
Likes: 809
From: South Carolina
Default

Cool... Not going for a mega horse power gain but 3 to 10 would be an improvement
 
Reply
HD Forum Stories

The Best of Harley-Davidson for Lifelong Riders

story-0

7 Times Harley-Davidson Chucked Tradition Out the Window

 Verdad Gallardo
story-1

7 Surprising Harley-Davidson Products that Are Not Motorcycles

 Verdad Gallardo
story-2

8 Best Harley-Davidson Motorcycles Ever

 Pouria Savadkouei
story-3

10 Worst Harley-Davidson Motorcycles Ever

 Pouria Savadkouei
story-4

Killer Custom's Jail Break Is The Breakout That Refused to Blend In

 Verdad Gallardo
story-5

Crazy Bunderbike Build Looks Amazing, But Is It Impossible to Ride?

 Verdad Gallardo
story-6

Harley-Davidson Reveals Super Cool Cafe Racer Concept

 Verdad Gallardo
story-7

Engraved Rebellion: Inside Bundnerbike's Glam Rock II

 Verdad Gallardo
story-8

10 Motorcycles You Should Never Buy

 Joe Kucinski
story-9

10 Things Harley-Davidson Needs to Fix in 2026

 Verdad Gallardo
Old Mar 13, 2021 | 02:19 PM
  #9  
roussfam's Avatar
roussfam
Seasoned HDF Member
15 Year Member
Top Answer: 1
Top Answer: 3
Top Answer: 5
Joined: Jan 2009
Posts: 12,689
Likes: 8,295
From: Ottawa, Ontario
Default

I don't think you're going to see those gains, I'm sure one of our members who have shops will be along with some data.

Don't know what kind of engine work you have but unless there was a specific reason I needed to change heads, I'd save my money and get a set of aftermarket cams if you don't have any or get my existing heads ported and polished.

Not enough bang for the buck to justify the expense of buying a second set and an intake manifold plus labor. BUT if you get a good deal and are able to sell your take offs, plus do the work yourself
 

Last edited by roussfam; Mar 13, 2021 at 02:22 PM.
Reply
Related Topics
Thread
Thread Starter
Forum
Replies
Last Post
ryanross75
General Harley Davidson Chat
0
Apr 7, 2013 09:56 PM
jurgie
Exhaust System Topics
2
Mar 31, 2012 08:31 AM
Jday53
Motorcycle Parts For Sale-Misc. Parts
0
Feb 2, 2010 04:31 PM
ironsport83
Engine Mechanical Topics
0
Oct 6, 2009 06:24 AM




All times are GMT -5. The time now is 12:05 AM.

story-0
7 Times Harley-Davidson Chucked Tradition Out the Window

Slideshow: Harley-Davidson built its reputation on nostalgia, but every so often, the company took a hard left turn into the future.

By Verdad Gallardo | 2026-05-20 11:18:19


VIEW MORE
story-1
7 Surprising Harley-Davidson Products that Are Not Motorcycles

Slideshow: The bar-and-shield logo shows up on far more than motorcycles, some of the company's most unexpected products have nothing to do with riding.

By Verdad Gallardo | 2026-04-29 16:50:35


VIEW MORE
story-2
8 Best Harley-Davidson Motorcycles Ever

Slideshow: Not every Harley gets it right, but these are the ones that genuinely earned their reputation.

By Pouria Savadkouei | 2026-04-15 14:23:21


VIEW MORE
story-3
10 Worst Harley-Davidson Motorcycles Ever

Slideshow: From the troubled AMF years to modern misfires, these bikes earned reputations for reliability issues, questionable engineering, or disappointing performance.

By Pouria Savadkouei | 2026-04-01 20:01:09


VIEW MORE
story-4
Killer Custom's Jail Break Is The Breakout That Refused to Blend In

Slideshow: Killer Custom's "Jail Breaker" build focuses more on stance and visual aggression than mechanical overhaul.

By Verdad Gallardo | 2026-03-18 19:20:32


VIEW MORE
story-5
Crazy Bunderbike Build Looks Amazing, But Is It Impossible to Ride?

Slideshow: The Swiss custom shop has taken a Harley Softail and stretched it into something so long and low that it looks closer to a rolling sculpture than a conventional motorcycle.

By Verdad Gallardo | 2026-03-07 16:15:30


VIEW MORE
story-6
Harley-Davidson Reveals Super Cool Cafe Racer Concept

Slideshow: Harley-Davidson's new RMCR concept revives the café racer formula with modern hardware-and it may be exactly the reset the company needs.

By Verdad Gallardo | 2026-03-04 12:23:37


VIEW MORE
story-7
Engraved Rebellion: Inside Bundnerbike's Glam Rock II

Slideshow: A standard cruiser becomes an intricate metal canvas in the hands of a Swiss custom house known for pushing Harley-Davidson platforms far beyond their factory brief.

By Verdad Gallardo | 2026-02-24 18:19:44


VIEW MORE
story-8
10 Motorcycles You Should Never Buy

Slideshow: There is no shortage of great motorcycles to buy, but we would avoid these ten.

By Joe Kucinski | 2026-02-19 14:50:51


VIEW MORE
story-9
10 Things Harley-Davidson Needs to Fix in 2026

Slideshow: Harley-Davidson's challenges aren't abstract; they show up in dropping shipments, shrinking dealer traffic, and strategic decisions that aren't yet translating into growth.

By Verdad Gallardo | 2026-01-13 18:33:17


VIEW MORE